211220211121002 has 24 divisors (see below), whose sum is σ = 457650632144160. Its totient is φ = 70405684520040.

The previous prime is 211220211121001. The next prime is 211220211121069. The reversal of 211220211121002 is 200121112022112.

211220211121002 is a `hidden beast` number, since 21 + 1 + 220 + 211 + 1 + 210 + 0 + 2 = 666.

It is a super-2 number, since 2×211220211121002² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211220211121001) 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, 86472024 + ... + 88881107.

It is an arithmetic number, because the mean of its divisors is an integer number (19068776339340).

Almost surely, 2^{211220211121002} is an apocalyptic number.

211220211121002 is an abundant number, since it is smaller than the sum of its proper divisors (246430421023158).

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

211220211121002 is a wasteful number, since it uses less digits than its factorization.

211220211121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175420058 (or 175420055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211220211121002 its reverse (200121112022112), we get a palindrome (411341323143114).

The spelling of 211220211121002 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred eleven million, one hundred twenty-one thousand, two".