20110220121020 has 24 divisors (see below), whose sum is σ = 42366387066864. Its totient is φ = 8018388084096.

The previous prime is 20110220121011. The next prime is 20110220121037. The reversal of 20110220121020 is 2012102201102.

It is a junction number, because it is equal to n+sod(n) for n = 20110220120986 and 20110220121004.

It is a congruent number.

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, 1606241354 + ... + 1606253873.

It is an arithmetic number, because the mean of its divisors is an integer number (1765266127786).

Almost surely, 2^{20110220121020} is an apocalyptic number.

20110220121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110220121020 is an abundant number, since it is smaller than the sum of its proper divisors (22256166945844).

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

20110220121020 is a wasteful number, since it uses less digits than its factorization.

20110220121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212495549 (or 3212495547 counting only the distinct ones).

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

Adding to 20110220121020 its reverse (2012102201102), we get a palindrome (22122322322122).

The spelling of 20110220121020 in words is "twenty trillion, one hundred ten billion, two hundred twenty million, one hundred twenty-one thousand, twenty".