1221002011022 has 32 divisors (see below), whose sum is σ = 1947828556800. Its totient is φ = 572395140000.

The previous prime is 1221002010979. The next prime is 1221002011063. The reversal of 1221002011022 is 2201102001221.

It is a junction number, because it is equal to n+sod(n) for n = 1221002010988 and 1221002011006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8955479 + ... + 9090797.

It is an arithmetic number, because the mean of its divisors is an integer number (60869642400).

Almost surely, 2^{1221002011022} is an apocalyptic number.

1221002011022 is a deficient number, since it is larger than the sum of its proper divisors (726826545778).

1221002011022 is a wasteful number, since it uses less digits than its factorization.

1221002011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137792.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221002011022 its reverse (2201102001221), we get a palindrome (3422104012243).

The spelling of 1221002011022 in words is "one trillion, two hundred twenty-one billion, two million, eleven thousand, twenty-two".