121010102021 has 2 divisors, whose sum is σ = 121010102022. Its totient is φ = 121010102020.

The previous prime is 121010102011. The next prime is 121010102093. The reversal of 121010102021 is 120201010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81424622500 + 39585479521 = 285350^2 + 198961^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010102021 - 2⁶ = 121010101957 is a prime.

It is a super-2 number, since 2×121010102021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121010101993 and 121010102011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010102011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505051010 + 60505051011.

It is an arithmetic number, because the mean of its divisors is an integer number (60505051011).

Almost surely, 2^121010102021 is an apocalyptic number.

It is an amenable number.

121010102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010102021 is an equidigital number, since it uses as much as digits as its factorization.

121010102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121010102021 its reverse (120201010121), we get a palindrome (241211112142).

The spelling of 121010102021 in words is "one hundred twenty-one billion, ten million, one hundred two thousand, twenty-one".