102021211221100 has 36 divisors (see below), whose sum is σ = 231011507848464. Its totient is φ = 39034202553280.

The previous prime is 102021211221071. The next prime is 102021211221103. The reversal of 102021211221100 is 1122112120201.

It is not an unprimeable number, because it can be changed into a prime (102021211221103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22178521879 + ... + 22178526478.

It is an arithmetic number, because the mean of its divisors is an integer number (6416986329124).

Almost surely, 2^{102021211221100} is an apocalyptic number.

102021211221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021211221100 is an abundant number, since it is smaller than the sum of its proper divisors (128990296627364).

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

102021211221100 is a wasteful number, since it uses less digits than its factorization.

102021211221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44357048394 (or 44357048387 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102021211221100 its reverse (1122112120201), we get a palindrome (103143323341301).

The spelling of 102021211221100 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".