1211212112022 has 24 divisors (see below), whose sum is σ = 2862864992520. Its totient is φ = 367033973280.

The previous prime is 1211212112009. The next prime is 1211212112023. The reversal of 1211212112022 is 2202112121121.

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 = 1211212111986 and 1211212112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211212112023) 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, 3058616247 + ... + 3058616642.

It is an arithmetic number, because the mean of its divisors is an integer number (119286041355).

Almost surely, 2^{1211212112022} is an apocalyptic number.

1211212112022 is an abundant number, since it is smaller than the sum of its proper divisors (1651652880498).

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

1211212112022 is a wasteful number, since it uses less digits than its factorization.

1211212112022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117232908 (or 6117232905 counting only the distinct ones).

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

Adding to 1211212112022 its reverse (2202112121121), we get a palindrome (3413324233143).

Subtracting 1211212112022 from its reverse (2202112121121), we obtain a palindrome (990900009099).

The spelling of 1211212112022 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred twelve thousand, twenty-two".