20212100122020 has 96 divisors (see below), whose sum is σ = 56698108161408. Its totient is φ = 5379968950272.

The previous prime is 20212100122003. The next prime is 20212100122069. The reversal of 20212100122020 is 2022100121202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388168027 + ... + 388220093.

It is an arithmetic number, because the mean of its divisors is an integer number (590605293348).

Almost surely, 2^{20212100122020} is an apocalyptic number.

20212100122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212100122020 is an abundant number, since it is smaller than the sum of its proper divisors (36486008039388).

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

20212100122020 is a wasteful number, since it uses less digits than its factorization.

20212100122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63869 (or 63867 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20212100122020 its reverse (2022100121202), we get a palindrome (22234200243222).

The spelling of 20212100122020 in words is "twenty trillion, two hundred twelve billion, one hundred million, one hundred twenty-two thousand, twenty".