21012201122020 has 48 divisors (see below), whose sum is σ = 47119685760000. Its totient is φ = 7853280946560.

The previous prime is 21012201121969. The next prime is 21012201122141. The reversal of 21012201122020 is 2022110221012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012201121985 and 21012201122003.

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, 584303520 + ... + 584339479.

It is an arithmetic number, because the mean of its divisors is an integer number (981660120000).

Almost surely, 2^{21012201122020} is an apocalyptic number.

21012201122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012201122020 is an abundant number, since it is smaller than the sum of its proper divisors (26107484637980).

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

21012201122020 is a wasteful number, since it uses less digits than its factorization.

21012201122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168643068 (or 1168643066 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012201122020 its reverse (2022110221012), we get a palindrome (23034311343032).

The spelling of 21012201122020 in words is "twenty-one trillion, twelve billion, two hundred one million, one hundred twenty-two thousand, twenty".