1220132251 has 16 divisors (see below), whose sum is σ = 1336207264. Its totient is φ = 1107385344.

The previous prime is 1220132219. The next prime is 1220132281. The reversal of 1220132251 is 1522310221.

It is not a de Polignac number, because 1220132251 - 2⁵ = 1220132219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220132201) 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, 194896 + ... + 201058.

It is an arithmetic number, because the mean of its divisors is an integer number (83512954).

Almost surely, 2^1220132251 is an apocalyptic number.

1220132251 is a deficient number, since it is larger than the sum of its proper divisors (116075013).

1220132251 is a wasteful number, since it uses less digits than its factorization.

1220132251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6430.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220132251 is about 34930.3915094005. The cubic root of 1220132251 is about 1068.5683391706.

Adding to 1220132251 its reverse (1522310221), we get a palindrome (2742442472).

The spelling of 1220132251 in words is "one billion, two hundred twenty million, one hundred thirty-two thousand, two hundred fifty-one".