220121232111020 has 24 divisors (see below), whose sum is σ = 462259760838624. Its totient is φ = 88047507433856.

The previous prime is 220121232110999. The next prime is 220121232111031. The reversal of 220121232111020 is 20111232121022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 220121232110983 and 220121232111001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59755112 + ... + 63331791.

It is an arithmetic number, because the mean of its divisors is an integer number (19260823368276).

Almost surely, 2^{220121232111020} is an apocalyptic number.

220121232111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121232111020 is an abundant number, since it is smaller than the sum of its proper divisors (242138528727604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220121232111020 is a wasteful number, since it uses less digits than its factorization.

220121232111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123176329 (or 123176327 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 220121232111020 its reverse (20111232121022), we get a palindrome (240232464232042).

The spelling of 220121232111020 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred thirty-two million, one hundred eleven thousand, twenty".