1210212222121 has 16 divisors (see below), whose sum is σ = 1387330560000. Its totient is φ = 1034154929808.

The previous prime is 1210212222103. The next prime is 1210212222127. The reversal of 1210212222121 is 1212222120121.

It is not a de Polignac number, because 1210212222121 - 2⁷ = 1210212221993 is a prime.

It is a super-2 number, since 2×1210212222121² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1210212222127) 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, 4258936 + ... + 4534198.

It is an arithmetic number, because the mean of its divisors is an integer number (86708160000).

Almost surely, 2^{1210212222121} is an apocalyptic number.

It is an amenable number.

1210212222121 is a deficient number, since it is larger than the sum of its proper divisors (177118337879).

1210212222121 is a wasteful number, since it uses less digits than its factorization.

1210212222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277188.

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

Adding to 1210212222121 its reverse (1212222120121), we get a palindrome (2422434342242).

The spelling of 1210212222121 in words is "one trillion, two hundred ten billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".