1220007057621 has 16 divisors (see below), whose sum is σ = 1775620320768. Its totient is φ = 738954633200.

The previous prime is 1220007057589. The next prime is 1220007057667. The reversal of 1220007057621 is 1267507000221.

It is a cyclic number.

It is not a de Polignac number, because 1220007057621 - 2⁵ = 1220007057589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220007057821) 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, 11033745 + ... + 11143766.

It is an arithmetic number, because the mean of its divisors is an integer number (110976270048).

Almost surely, 2^{1220007057621} is an apocalyptic number.

1220007057621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220007057621 is a deficient number, since it is larger than the sum of its proper divisors (555613263147).

1220007057621 is a wasteful number, since it uses less digits than its factorization.

1220007057621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22179192.

The product of its (nonzero) digits is 11760, while the sum is 33.

The spelling of 1220007057621 in words is "one trillion, two hundred twenty billion, seven million, fifty-seven thousand, six hundred twenty-one".