21220111031130 has 128 divisors (see below), whose sum is σ = 62140049510400. Its totient is φ = 5110201224000.

The previous prime is 21220111031107. The next prime is 21220111031177. The reversal of 21220111031130 is 3113011102212.

21220111031130 is a `hidden beast` number, since 2 + 12 + 201 + 110 + 311 + 30 = 666.

It is a super-2 number, since 2×21220111031130² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23209870 + ... + 24106809.

It is an arithmetic number, because the mean of its divisors is an integer number (485469136800).

Almost surely, 2^{21220111031130} is an apocalyptic number.

21220111031130 is an abundant number, since it is smaller than the sum of its proper divisors (40919938479270).

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

21220111031130 is a wasteful number, since it uses less digits than its factorization.

21220111031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47316857 (or 47316851 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21220111031130 its reverse (3113011102212), we get a palindrome (24333122133342).

The spelling of 21220111031130 in words is "twenty-one trillion, two hundred twenty billion, one hundred eleven million, thirty-one thousand, one hundred thirty".