1220025131 has 12 divisors (see below), whose sum is σ = 1386669312. Its totient is φ = 1066900464.

The previous prime is 1220025109. The next prime is 1220025143. The reversal of 1220025131 is 1315200221.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1220025131 is a prime.

It is a super-2 number, since 2×1220025131² = 2976922640543134322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220027131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125291 + ... + 134676.

It is an arithmetic number, because the mean of its divisors is an integer number (115555776).

Almost surely, 2^1220025131 is an apocalyptic number.

1220025131 is a deficient number, since it is larger than the sum of its proper divisors (166644181).

1220025131 is a wasteful number, since it uses less digits than its factorization.

1220025131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260018 (or 259999 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1220025131 is about 34928.8581405118. The cubic root of 1220025131 is about 1068.5370670440.

Adding to 1220025131 its reverse (1315200221), we get a palindrome (2535225352).

The spelling of 1220025131 in words is "one billion, two hundred twenty million, twenty-five thousand, one hundred thirty-one".