10102111021021 has 4 divisors (see below), whose sum is σ = 10102160224000. Its totient is φ = 10102061818044.

The previous prime is 10102111021019. The next prime is 10102111021033. The reversal of 10102111021021 is 12012011120101.

It is a happy number.

10102111021021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10102111021021 - 2¹ = 10102111021019 is a prime.

It is a super-2 number, since 2×10102111021021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10102111020992 and 10102111021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102111021081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24292221 + ... + 24704578.

It is an arithmetic number, because the mean of its divisors is an integer number (2525540056000).

Almost surely, 2^{10102111021021} is an apocalyptic number.

It is an amenable number.

10102111021021 is a deficient number, since it is larger than the sum of its proper divisors (49202979).

10102111021021 is an equidigital number, since it uses as much as digits as its factorization.

10102111021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49202978.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10102111021021 its reverse (12012011120101), we get a palindrome (22114122141122).

The spelling of 10102111021021 in words is "ten trillion, one hundred two billion, one hundred eleven million, twenty-one thousand, twenty-one".