1220620122547 has 32 divisors (see below), whose sum is σ = 1410394374144. Its totient is φ = 1034759155200.

The previous prime is 1220620122521. The next prime is 1220620122551. The reversal of 1220620122547 is 7452210260221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220620122547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220620120547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 632117172 + ... + 632119102.

It is an arithmetic number, because the mean of its divisors is an integer number (44074824192).

Almost surely, 2^{1220620122547} is an apocalyptic number.

1220620122547 is a deficient number, since it is larger than the sum of its proper divisors (189774251597).

1220620122547 is a wasteful number, since it uses less digits than its factorization.

1220620122547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179.

The product of its (nonzero) digits is 26880, while the sum is 34.

Adding to 1220620122547 its reverse (7452210260221), we get a palindrome (8672830382768).

The spelling of 1220620122547 in words is "one trillion, two hundred twenty billion, six hundred twenty million, one hundred twenty-two thousand, five hundred forty-seven".