102121022211220 has 24 divisors (see below), whose sum is σ = 214454504361384. Its totient is φ = 40848340747776.

The previous prime is 102121022211209. The next prime is 102121022211293. The reversal of 102121022211220 is 22112220121201.

It can be written as a sum of positive squares in 4 ways, for example, as 3420413518096 + 98700608693124 = 1849436^2 + 9934818^2 .

It is a congruent number.

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, 9044992 + ... + 16913128.

It is an arithmetic number, because the mean of its divisors is an integer number (8935604348391).

Almost surely, 2^{102121022211220} is an apocalyptic number.

102121022211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121022211220 is an abundant number, since it is smaller than the sum of its proper divisors (112333482150164).

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

102121022211220 is a wasteful number, since it uses less digits than its factorization.

102121022211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517099 (or 8517097 counting only the distinct ones).

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

Adding to 102121022211220 its reverse (22112220121201), we get a palindrome (124233242332421).

The spelling of 102121022211220 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-two million, two hundred eleven thousand, two hundred twenty".