1221020110022 has 16 divisors (see below), whose sum is σ = 1848405926400. Its totient is φ = 604885242240.

The previous prime is 1221020110007. The next prime is 1221020110027. The reversal of 1221020110022 is 2200110201221.

It is a junction number, because it is equal to n+sod(n) for n = 1221020109979 and 1221020110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221020110027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6294254 + ... + 6485342.

It is an arithmetic number, because the mean of its divisors is an integer number (115525370400).

Almost surely, 2^{1221020110022} is an apocalyptic number.

1221020110022 is a deficient number, since it is larger than the sum of its proper divisors (627385816378).

1221020110022 is a wasteful number, since it uses less digits than its factorization.

1221020110022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220511.

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

Adding to 1221020110022 its reverse (2200110201221), we get a palindrome (3421130311243).

The spelling of 1221020110022 in words is "one trillion, two hundred twenty-one billion, twenty million, one hundred ten thousand, twenty-two".