1202010021 has 12 divisors (see below), whose sum is σ = 1740385920. Its totient is φ = 799425000.

The previous prime is 1202010013. The next prime is 1202010023. The reversal of 1202010021 is 1200102021.

It is not a de Polignac number, because 1202010021 - 2³ = 1202010013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1202009985 and 1202010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202010023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155605 + ... + 163146.

It is an arithmetic number, because the mean of its divisors is an integer number (145032160).

Almost surely, 2^1202010021 is an apocalyptic number.

It is an amenable number.

1202010021 is a deficient number, since it is larger than the sum of its proper divisors (538375899).

1202010021 is a wasteful number, since it uses less digits than its factorization.

1202010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319176 (or 319173 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1202010021 is about 34670.0161667110. The cubic root of 1202010021 is about 1063.2515621145.

Adding to 1202010021 its reverse (1200102021), we get a palindrome (2402112042).

The spelling of 1202010021 in words is "one billion, two hundred two million, ten thousand, twenty-one".