31220211101 has 16 divisors (see below), whose sum is σ = 31773316608. Its totient is φ = 30672864000.

The previous prime is 31220211097. The next prime is 31220211107. The reversal of 31220211101 is 10111202213.

It is not a de Polignac number, because 31220211101 - 2² = 31220211097 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 (31220211107) 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, 7196405 + ... + 7200741.

It is an arithmetic number, because the mean of its divisors is an integer number (1985832288).

Almost surely, 2^31220211101 is an apocalyptic number.

It is an amenable number.

31220211101 is a deficient number, since it is larger than the sum of its proper divisors (553105507).

31220211101 is a wasteful number, since it uses less digits than its factorization.

31220211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 31220211101 its reverse (10111202213), we get a palindrome (41331413314).

The spelling of 31220211101 in words is "thirty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred one".