1211012212122 has 48 divisors (see below), whose sum is σ = 2650861565352. Its totient is φ = 399519705600.

The previous prime is 1211012212073. The next prime is 1211012212133. The reversal of 1211012212122 is 2212122101121.

It can be written as a sum of positive squares in 4 ways, for example, as 1048168487601 + 162843724521 = 1023801^2 + 403539^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1211012212095 and 1211012212104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4630438 + ... + 4884974.

Almost surely, 2^{1211012212122} is an apocalyptic number.

1211012212122 is an abundant number, since it is smaller than the sum of its proper divisors (1439849353230).

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

1211012212122 is a wasteful number, since it uses less digits than its factorization.

1211012212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257263 (or 257260 counting only the distinct ones).

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

Adding to 1211012212122 its reverse (2212122101121), we get a palindrome (3423134313243).

The spelling of 1211012212122 in words is "one trillion, two hundred eleven billion, twelve million, two hundred twelve thousand, one hundred twenty-two".