1011402421 has 2 divisors, whose sum is σ = 1011402422. Its totient is φ = 1011402420.

The previous prime is 1011402409. The next prime is 1011402467. The reversal of 1011402421 is 1242041101.

It is a happy number.

1011402421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997675396 + 13727025 = 31586^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011402421 - 2¹¹ = 1011400373 is a prime.

It is a super-2 number, since 2×1011402421² = 2045869714409322482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011402395 and 1011402404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011402481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505701210 + 505701211.

It is an arithmetic number, because the mean of its divisors is an integer number (505701211).

Almost surely, 2^1011402421 is an apocalyptic number.

It is an amenable number.

1011402421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011402421 is an equidigital number, since it uses as much as digits as its factorization.

1011402421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1011402421 is about 31802.5536867718. The cubic root of 1011402421 is about 1003.7864516879.

Adding to 1011402421 its reverse (1242041101), we get a palindrome (2253443522).

The spelling of 1011402421 in words is "one billion, eleven million, four hundred two thousand, four hundred twenty-one".