1221122220022 has 8 divisors (see below), whose sum is σ = 1831769879400. Its totient is φ = 610532260224.

The previous prime is 1221122219921. The next prime is 1221122220061. The reversal of 1221122220022 is 2200222211221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221122220022² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14371947 + ... + 14456662.

It is an arithmetic number, because the mean of its divisors is an integer number (228971234925).

Almost surely, 2^{1221122220022} is an apocalyptic number.

1221122220022 is a deficient number, since it is larger than the sum of its proper divisors (610647659378).

1221122220022 is a wasteful number, since it uses less digits than its factorization.

1221122220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28849790.

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

Adding to 1221122220022 its reverse (2200222211221), we get a palindrome (3421344431243).

The spelling of 1221122220022 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, twenty-two".