21012011022 has 16 divisors (see below), whose sum is σ = 42062135040. Its totient is φ = 6997651512.

The previous prime is 21012010967. The next prime is 21012011051. The reversal of 21012011022 is 22011021012.

It is a junction number, because it is equal to n+sod(n) for n = 21012010989 and 21012011007.

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, 1580872 + ... + 1594107.

It is an arithmetic number, because the mean of its divisors is an integer number (2628883440).

Almost surely, 2^21012011022 is an apocalyptic number.

21012011022 is an abundant number, since it is smaller than the sum of its proper divisors (21050124018).

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

21012011022 is a wasteful number, since it uses less digits than its factorization.

21012011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176087.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21012011022 its reverse (22011021012), we get a palindrome (43023032034).

The spelling of 21012011022 in words is "twenty-one billion, twelve million, eleven thousand, twenty-two".