211012120222121 has 16 divisors (see below), whose sum is σ = 213371584693440. Its totient is φ = 208665593398080.

The previous prime is 211012120222109. The next prime is 211012120222147. The reversal of 211012120222121 is 121222021210112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211012120222121 is a prime.

It is a super-2 number, since 2×211012120222121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211012120222093 and 211012120222102.

It is not an unprimeable number, because it can be changed into a prime (211012120222151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869031710 + ... + 869274488.

It is an arithmetic number, because the mean of its divisors is an integer number (13335724043340).

Almost surely, 2^{211012120222121} is an apocalyptic number.

It is an amenable number.

211012120222121 is a deficient number, since it is larger than the sum of its proper divisors (2359464471319).

211012120222121 is a wasteful number, since it uses less digits than its factorization.

211012120222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269384.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211012120222121 its reverse (121222021210112), we get a palindrome (332234141432233).

The spelling of 211012120222121 in words is "two hundred eleven trillion, twelve billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".