211220120101210 has 128 divisors (see below), whose sum is σ = 443568338251776. Its totient is φ = 71564049392640.

The previous prime is 211220120101183. The next prime is 211220120101247. The reversal of 211220120101210 is 12101021022112.

It is a super-2 number, since 2×211220120101210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 289165467 + ... + 289894993.

It is an arithmetic number, because the mean of its divisors is an integer number (3465377642592).

Almost surely, 2^{211220120101210} is an apocalyptic number.

211220120101210 is an abundant number, since it is smaller than the sum of its proper divisors (232348218150566).

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

211220120101210 is a wasteful number, since it uses less digits than its factorization.

211220120101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731116.

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

Adding to 211220120101210 its reverse (12101021022112), we get a palindrome (223321141123322).

The spelling of 211220120101210 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred twenty million, one hundred one thousand, two hundred ten".