30122200021 has 16 divisors (see below), whose sum is σ = 30688081200. Its totient is φ = 29560854528.

The previous prime is 30122199973. The next prime is 30122200039. The reversal of 30122200021 is 12000222103.

It can be written as a sum of positive squares in 8 ways, for example, as 2537640625 + 27584559396 = 50375^2 + 166086^2 .

It is a cyclic number.

It is not a de Polignac number, because 30122200021 - 2³¹ = 27974716373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30122199974 and 30122200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30122200061) 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, 18720265 + ... + 18721873.

It is an arithmetic number, because the mean of its divisors is an integer number (1918005075).

Almost surely, 2^30122200021 is an apocalyptic number.

It is an amenable number.

30122200021 is a deficient number, since it is larger than the sum of its proper divisors (565881179).

30122200021 is a wasteful number, since it uses less digits than its factorization.

30122200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 30122200021 its reverse (12000222103), we get a palindrome (42122422124).

The spelling of 30122200021 in words is "thirty billion, one hundred twenty-two million, two hundred thousand, twenty-one".