211121200101210 has 64 divisors (see below), whose sum is σ = 609552938649600. Its totient is φ = 45716470396992.

The previous prime is 211121200101209. The next prime is 211121200101211. The reversal of 211121200101210 is 12101002121112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211121200101209) and next prime (211121200101211).

It is a super-2 number, since 2×211121200101210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211121200101210.

It is not an unprimeable number, because it can be changed into a prime (211121200101211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26456286750 + ... + 26456294729.

It is an arithmetic number, because the mean of its divisors is an integer number (9524264666400).

Almost surely, 2^{211121200101210} is an apocalyptic number.

211121200101210 is an abundant number, since it is smaller than the sum of its proper divisors (398431738548390).

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

211121200101210 is a wasteful number, since it uses less digits than its factorization.

211121200101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52912581515.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211121200101210 its reverse (12101002121112), we get a palindrome (223222202222322).

The spelling of 211121200101210 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred million, one hundred one thousand, two hundred ten".