102111202120 has 32 divisors (see below), whose sum is σ = 229882934520. Its totient is φ = 40820884480.

The previous prime is 102111202099. The next prime is 102111202133. The reversal of 102111202120 is 21202111201.

It can be written as a sum of positive squares in 4 ways, for example, as 89967602916 + 12143599204 = 299946^2 + 110198^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102111202120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667201 + ... + 805840.

Almost surely, 2^102111202120 is an apocalyptic number.

102111202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111202120 is an abundant number, since it is smaller than the sum of its proper divisors (127771732400).

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

102111202120 is a wasteful number, since it uses less digits than its factorization.

102111202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474785 (or 1474781 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102111202120 its reverse (21202111201), we get a palindrome (123313313321).

The spelling of 102111202120 in words is "one hundred two billion, one hundred eleven million, two hundred two thousand, one hundred twenty".