102111220221220 has 24 divisors (see below), whose sum is σ = 245066928531264. Its totient is φ = 35009561218656.

The previous prime is 102111220221181. The next prime is 102111220221301. The reversal of 102111220221220 is 22122022111201.

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, 364682929222 + ... + 364682929501.

It is an arithmetic number, because the mean of its divisors is an integer number (10211122022136).

Almost surely, 2^{102111220221220} is an apocalyptic number.

102111220221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111220221220 is an abundant number, since it is smaller than the sum of its proper divisors (142955708310044).

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

102111220221220 is a wasteful number, since it uses less digits than its factorization.

102111220221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729365858739 (or 729365858737 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102111220221220 its reverse (22122022111201), we get a palindrome (124233242332421).

The spelling of 102111220221220 in words is "one hundred two trillion, one hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty".