102012000110021 has 4 divisors (see below), whose sum is σ = 103936754829132. Its totient is φ = 100087245390912.

The previous prime is 102012000110017. The next prime is 102012000110023. The reversal of 102012000110021 is 120011000210201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92915834589796 + 9096165520225 = 9639286^2 + 3015985^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012000110021 - 2² = 102012000110017 is a prime.

It is a super-2 number, since 2×102012000110021² (a number of 29 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 = 102012000109984 and 102012000110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012000110023) 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, 962377359476 + ... + 962377359581.

It is an arithmetic number, because the mean of its divisors is an integer number (25984188707283).

Almost surely, 2^{102012000110021} is an apocalyptic number.

It is an amenable number.

102012000110021 is a deficient number, since it is larger than the sum of its proper divisors (1924754719111).

102012000110021 is an equidigital number, since it uses as much as digits as its factorization.

102012000110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924754719110.

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

Adding to 102012000110021 its reverse (120011000210201), we get a palindrome (222023000320222).

The spelling of 102012000110021 in words is "one hundred two trillion, twelve billion, one hundred ten thousand, twenty-one".