21011120022 has 32 divisors (see below), whose sum is σ = 43056528480. Its totient is φ = 6831399680.

The previous prime is 21011120003. The next prime is 21011120041. The reversal of 21011120022 is 22002111012.

It is an interprime number because it is at equal distance from previous prime (21011120003) and next prime (21011120041).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2068468 + ... + 2078600.

It is an arithmetic number, because the mean of its divisors is an integer number (1345516515).

Almost surely, 2^21011120022 is an apocalyptic number.

21011120022 is an abundant number, since it is smaller than the sum of its proper divisors (22045408458).

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

21011120022 is a wasteful number, since it uses less digits than its factorization.

21011120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18608.

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

Adding to 21011120022 its reverse (22002111012), we get a palindrome (43013231034).

The spelling of 21011120022 in words is "twenty-one billion, eleven million, one hundred twenty thousand, twenty-two".