1220101394724 has 81 divisors (see below), whose sum is σ = 3101616015771. Its totient is φ = 404409561840.

The previous prime is 1220101394719. The next prime is 1220101394731. The reversal of 1220101394724 is 4274931010221.

The square root of 1220101394724 is 1104582.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1504440279 + ... + 1504441089.

Almost surely, 2^{1220101394724} is an apocalyptic number.

1220101394724 is the 1104582-nd square number.

It is an amenable number.

1220101394724 is an abundant number, since it is smaller than the sum of its proper divisors (1881514621047).

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

1220101394724 is an frugal number, since it uses more digits than its factorization.

1220101394724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Multiplying 1220101394724 by its sum of digits (36), we get a square (43923650210064 = 6627492²).

1220101394724 divided by its sum of digits (36) gives a square (33891705409 = 184097²).

The spelling of 1220101394724 in words is "one trillion, two hundred twenty billion, one hundred one million, three hundred ninety-four thousand, seven hundred twenty-four".