102120021011021 has 8 divisors (see below), whose sum is σ = 112657734249144. Its totient is φ = 91965497345280.

The previous prime is 102120021010981. The next prime is 102120021011033. The reversal of 102120021011021 is 120110120021201.

It can be written as a sum of positive squares in 4 ways, for example, as 6692058025 + 102113328952996 = 81805^2 + 10105114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102120021011021 - 2⁶ = 102120021010957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120021010987 and 102120021011005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120021011051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95797392536 + ... + 95797393601.

It is an arithmetic number, because the mean of its divisors is an integer number (14082216781143).

Almost surely, 2^{102120021011021} is an apocalyptic number.

It is an amenable number.

102120021011021 is a deficient number, since it is larger than the sum of its proper divisors (10537713238123).

102120021011021 is a wasteful number, since it uses less digits than its factorization.

102120021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191594786191.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102120021011021 its reverse (120110120021201), we get a palindrome (222230141032222).

The spelling of 102120021011021 in words is "one hundred two trillion, one hundred twenty billion, twenty-one million, eleven thousand, twenty-one".