102103210111021 has 16 divisors (see below), whose sum is σ = 121763647862784. Its totient is φ = 83711389419504.

The previous prime is 102103210111009. The next prime is 102103210111033. The reversal of 102103210111021 is 120111012301201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102103210111009) and next prime (102103210111033).

It is not a de Polignac number, because 102103210111021 - 2³⁵ = 102068850372653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102103210110986 and 102103210111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102103210111081) 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, 22976656 + ... + 27057958.

It is an arithmetic number, because the mean of its divisors is an integer number (7610227991424).

Almost surely, 2^{102103210111021} is an apocalyptic number.

It is an amenable number.

102103210111021 is a deficient number, since it is larger than the sum of its proper divisors (19660437751763).

102103210111021 is a wasteful number, since it uses less digits than its factorization.

102103210111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236720.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 102103210111021 its reverse (120111012301201), we get a palindrome (222214222412222).

The spelling of 102103210111021 in words is "one hundred two trillion, one hundred three billion, two hundred ten million, one hundred eleven thousand, twenty-one".