21020012020022 has 16 divisors (see below), whose sum is σ = 31569449736240. Its totient is φ = 10496868791328.

The previous prime is 21020012019997. The next prime is 21020012020037. The reversal of 21020012020022 is 22002021002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020012019979 and 21020012020006.

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, 4628768 + ... + 7966524.

It is an arithmetic number, because the mean of its divisors is an integer number (1973090608515).

Almost surely, 2^{21020012020022} is an apocalyptic number.

21020012020022 is a deficient number, since it is larger than the sum of its proper divisors (10549437716218).

21020012020022 is a wasteful number, since it uses less digits than its factorization.

21020012020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341695.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21020012020022 its reverse (22002021002012), we get a palindrome (43022033022034).

The spelling of 21020012020022 in words is "twenty-one trillion, twenty billion, twelve million, twenty thousand, twenty-two".