220121131263 has 48 divisors (see below), whose sum is σ = 341738788608. Its totient is φ = 125500320000.

The previous prime is 220121131259. The next prime is 220121131267. The reversal of 220121131263 is 362131121022.

It is an interprime number because it is at equal distance from previous prime (220121131259) and next prime (220121131267).

It is not a de Polignac number, because 220121131263 - 2² = 220121131259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121131267) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15438888 + ... + 15453138.

It is an arithmetic number, because the mean of its divisors is an integer number (7119558096).

Almost surely, 2^220121131263 is an apocalyptic number.

220121131263 is a deficient number, since it is larger than the sum of its proper divisors (121617657345).

220121131263 is a wasteful number, since it uses less digits than its factorization.

220121131263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16796 (or 16785 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 220121131263 its reverse (362131121022), we get a palindrome (582252252285).

The spelling of 220121131263 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred sixty-three".