1220111130021 has 16 divisors (see below), whose sum is σ = 1859834531328. Its totient is φ = 696974770800.

The previous prime is 1220111130011. The next prime is 1220111130047. The reversal of 1220111130021 is 1200311110221.

It is not a de Polignac number, because 1220111130021 - 2⁹ = 1220111129509 is a prime.

It is a super-2 number, since 2×1220111130021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111130011) 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, 9584815 + ... + 9711276.

It is an arithmetic number, because the mean of its divisors is an integer number (116239658208).

Almost surely, 2^{1220111130021} is an apocalyptic number.

It is an amenable number.

1220111130021 is a deficient number, since it is larger than the sum of its proper divisors (639723401307).

1220111130021 is a wasteful number, since it uses less digits than its factorization.

1220111130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19299112.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1220111130021 its reverse (1200311110221), we get a palindrome (2420422240242).

The spelling of 1220111130021 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred thirty thousand, twenty-one".