1220225515311 has 24 divisors (see below), whose sum is σ = 1788384648960. Its totient is φ = 739503669520.

The previous prime is 1220225515283. The next prime is 1220225515319. The reversal of 1220225515311 is 1135155220221.

It is not a de Polignac number, because 1220225515311 - 2⁹ = 1220225514799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220225515319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15030916 + ... + 15111878.

It is an arithmetic number, because the mean of its divisors is an integer number (74516027040).

Almost surely, 2^{1220225515311} is an apocalyptic number.

1220225515311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220225515311 is a deficient number, since it is larger than the sum of its proper divisors (568159133649).

1220225515311 is a wasteful number, since it uses less digits than its factorization.

1220225515311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122507 (or 122496 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 1220225515311 in words is "one trillion, two hundred twenty billion, two hundred twenty-five million, five hundred fifteen thousand, three hundred eleven".