21021021001122 has 64 divisors (see below), whose sum is σ = 42349434716160. Its totient is φ = 6955905320000.

The previous prime is 21021021001111. The next prime is 21021021001133. The reversal of 21021021001122 is 22110012012012.

It is an interprime number because it is at equal distance from previous prime (21021021001111) and next prime (21021021001133).

It is a super-2 number, since 2×21021021001122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4424544247 + ... + 4424548997.

It is an arithmetic number, because the mean of its divisors is an integer number (661709917440).

Almost surely, 2^{21021021001122} is an apocalyptic number.

21021021001122 is an abundant number, since it is smaller than the sum of its proper divisors (21328413715038).

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

21021021001122 is a wasteful number, since it uses less digits than its factorization.

21021021001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10519.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021021001122 its reverse (22110012012012), we get a palindrome (43131033013134).

The spelling of 21021021001122 in words is "twenty-one trillion, twenty-one billion, twenty-one million, one thousand, one hundred twenty-two".