31220130101 has 4 divisors (see below), whose sum is σ = 32227231104. Its totient is φ = 30213029100.

The previous prime is 31220130083. The next prime is 31220130107. The reversal of 31220130101 is 10103102213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31220130101 - 2²² = 31215935797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220130107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503550455 + ... + 503550516.

It is an arithmetic number, because the mean of its divisors is an integer number (8056807776).

Almost surely, 2^31220130101 is an apocalyptic number.

31220130101 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31220130101 is a deficient number, since it is larger than the sum of its proper divisors (1007101003).

31220130101 is a wasteful number, since it uses less digits than its factorization.

31220130101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007101002.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31220130101 its reverse (10103102213), we get a palindrome (41323232314).

The spelling of 31220130101 in words is "thirty-one billion, two hundred twenty million, one hundred thirty thousand, one hundred one".