221021131310 has 32 divisors (see below), whose sum is σ = 454689192960. Its totient is φ = 75775815072.

The previous prime is 221021131307. The next prime is 221021131321. The reversal of 221021131310 is 13131120122.

It is a super-2 number, since 2×221021131310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2748251 + ... + 2827529.

It is an arithmetic number, because the mean of its divisors is an integer number (14209037280).

Almost surely, 2^221021131310 is an apocalyptic number.

221021131310 is an abundant number, since it is smaller than the sum of its proper divisors (233668061650).

221021131310 is a wasteful number, since it uses less digits than its factorization.

221021131310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119120.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221021131310 its reverse (13131120122), we get a palindrome (234152251432).

The spelling of 221021131310 in words is "two hundred twenty-one billion, twenty-one million, one hundred thirty-one thousand, three hundred ten".