1221210222122 has 64 divisors (see below), whose sum is σ = 2106518400000. Its totient is φ = 525548474880.

The previous prime is 1221210222103. The next prime is 1221210222203. The reversal of 1221210222122 is 2212220121221.

It is a junction number, because it is equal to n+sod(n) for n = 1221210222094 and 1221210222103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67614329 + ... + 67632387.

It is an arithmetic number, because the mean of its divisors is an integer number (32914350000).

Almost surely, 2^{1221210222122} is an apocalyptic number.

1221210222122 is a deficient number, since it is larger than the sum of its proper divisors (885308177878).

1221210222122 is a wasteful number, since it uses less digits than its factorization.

1221210222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19451.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221210222122 its reverse (2212220121221), we get a palindrome (3433430343343).

The spelling of 1221210222122 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-two".