102120101100 has 54 divisors (see below), whose sum is σ = 320089786380. Its totient is φ = 27232026720.

The previous prime is 102120101099. The next prime is 102120101129. The reversal of 102120101100 is 1101021201.

It is a happy number.

It is a super-4 number, since 4×102120101100⁴ (a number of 45 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56732490 + ... + 56734289.

Almost surely, 2^102120101100 is an apocalyptic number.

102120101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120101100 is an abundant number, since it is smaller than the sum of its proper divisors (217969685280).

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

102120101100 is a wasteful number, since it uses less digits than its factorization.

102120101100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113466799 (or 113466789 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 102120101100 its reverse (1101021201), we get a palindrome (103221122301).

The spelling of 102120101100 in words is "one hundred two billion, one hundred twenty million, one hundred one thousand, one hundred".