102121220202100 has 72 divisors (see below), whose sum is σ = 245153692034496. Its totient is φ = 36611961120000.

The previous prime is 102121220202037. The next prime is 102121220202107. The reversal of 102121220202100 is 1202022121201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121220202107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653706921 + ... + 653863120.

It is an arithmetic number, because the mean of its divisors is an integer number (3404912389368).

Almost surely, 2^{102121220202100} is an apocalyptic number.

102121220202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121220202100 is an abundant number, since it is smaller than the sum of its proper divisors (143032471832396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102121220202100 is a wasteful number, since it uses less digits than its factorization.

102121220202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307570137 (or 1307570130 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102121220202100 its reverse (1202022121201), we get a palindrome (103323242323301).

The spelling of 102121220202100 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twenty million, two hundred two thousand, one hundred".