21122000030 has 32 divisors (see below), whose sum is σ = 40338194400. Its totient is φ = 7935585280.

The previous prime is 21122000023. The next prime is 21122000033. The reversal of 21122000030 is 3000022112.

It is a happy number.

It is a super-2 number, since 2×21122000030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121999975 and 21122000020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122000033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43055 + ... + 209994.

It is an arithmetic number, because the mean of its divisors is an integer number (1260568575).

Almost surely, 2^21122000030 is an apocalyptic number.

21122000030 is a deficient number, since it is larger than the sum of its proper divisors (19216194370).

21122000030 is a wasteful number, since it uses less digits than its factorization.

21122000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253564.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21122000030 its reverse (3000022112), we get a palindrome (24122022142).

The spelling of 21122000030 in words is "twenty-one billion, one hundred twenty-two million, thirty", and thus it is an aban number.