1220101131 has 16 divisors (see below), whose sum is σ = 1767664640. Its totient is φ = 745731360.

The previous prime is 1220101123. The next prime is 1220101139. The reversal of 1220101131 is 1311010221.

It is an interprime number because it is at equal distance from previous prime (1220101123) and next prime (1220101139).

It is not a de Polignac number, because 1220101131 - 2³ = 1220101123 is a prime.

It is a super-3 number, since 3×1220101131³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1220101139) 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, 343480 + ... + 347013.

It is an arithmetic number, because the mean of its divisors is an integer number (110479040).

Almost surely, 2^1220101131 is an apocalyptic number.

1220101131 is a deficient number, since it is larger than the sum of its proper divisors (547563509).

1220101131 is a wasteful number, since it uses less digits than its factorization.

1220101131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690546.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1220101131 is about 34929.9460491997. The cubic root of 1220101131 is about 1068.5592543277.

Adding to 1220101131 its reverse (1311010221), we get a palindrome (2531111352).

The spelling of 1220101131 in words is "one billion, two hundred twenty million, one hundred one thousand, one hundred thirty-one".