10102121021 has 16 divisors (see below), whose sum is σ = 11151670464. Its totient is φ = 9111508224.

The previous prime is 10102121009. The next prime is 10102121033. The reversal of 10102121021 is 12012120101.

It is an interprime number because it is at equal distance from previous prime (10102121009) and next prime (10102121033).

It is not a de Polignac number, because 10102121021 - 2²² = 10097926717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10102120993 and 10102121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102121321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91631 + ... + 169116.

It is an arithmetic number, because the mean of its divisors is an integer number (696979404).

Almost surely, 2^10102121021 is an apocalyptic number.

It is an amenable number.

10102121021 is a deficient number, since it is larger than the sum of its proper divisors (1049549443).

10102121021 is a wasteful number, since it uses less digits than its factorization.

10102121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260860.

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

Adding to 10102121021 its reverse (12012120101), we get a palindrome (22114241122).

The spelling of 10102121021 in words is "ten billion, one hundred two million, one hundred twenty-one thousand, twenty-one".