31220440010401 has 4 divisors (see below), whose sum is σ = 32863621063600. Its totient is φ = 29577258957204.

The previous prime is 31220440010381. The next prime is 31220440010407. The reversal of 31220440010401 is 10401004402213.

It is a happy number.

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 31220440010401 - 2⁷ = 31220440010273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31220440010407) 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, 821590526571 + ... + 821590526608.

It is an arithmetic number, because the mean of its divisors is an integer number (8215905265900).

Almost surely, 2^{31220440010401} is an apocalyptic number.

It is an amenable number.

31220440010401 is a deficient number, since it is larger than the sum of its proper divisors (1643181053199).

31220440010401 is a wasteful number, since it uses less digits than its factorization.

31220440010401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643181053198.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31220440010401 its reverse (10401004402213), we get a palindrome (41621444412614).

The spelling of 31220440010401 in words is "thirty-one trillion, two hundred twenty billion, four hundred forty million, ten thousand, four hundred one".