1212221220022 has 32 divisors (see below), whose sum is σ = 1830400859232. Its totient is φ = 602101403904.

The previous prime is 1212221220011. The next prime is 1212221220029. The reversal of 1212221220022 is 2200221222121.

It is a super-2 number, since 2×1212221220022² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221220029) 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, 633674538 + ... + 633676450.

It is an arithmetic number, because the mean of its divisors is an integer number (57200026851).

Almost surely, 2^{1212221220022} is an apocalyptic number.

1212221220022 is a deficient number, since it is larger than the sum of its proper divisors (618179639210).

1212221220022 is a wasteful number, since it uses less digits than its factorization.

1212221220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212221220022 its reverse (2200221222121), we get a palindrome (3412442442143).

The spelling of 1212221220022 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, twenty-two".