1922100021 has 24 divisors (see below), whose sum is σ = 2924507040. Its totient is φ = 1213120800.

The previous prime is 1922099969. The next prime is 1922100023. The reversal of 1922100021 is 1200012291.

1922100021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1922100021 - 2¹⁸ = 1921837877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1922099967 and 1922100003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1922100023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327291 + ... + 333111.

It is an arithmetic number, because the mean of its divisors is an integer number (121854460).

Almost surely, 2^1922100021 is an apocalyptic number.

It is an amenable number.

1922100021 is a deficient number, since it is larger than the sum of its proper divisors (1002407019).

1922100021 is a wasteful number, since it uses less digits than its factorization.

1922100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777 (or 7774 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1922100021 is about 43841.7611530376. The cubic root of 1922100021 is about 1243.3459798771.

The spelling of 1922100021 in words is "one billion, nine hundred twenty-two million, one hundred thousand, twenty-one".