31261401252111 has 16 divisors (see below), whose sum is σ = 42772500233568. Its totient is φ = 20297380147200.

The previous prime is 31261401252089. The next prime is 31261401252199. The reversal of 31261401252111 is 11125210416213.

It is not a de Polignac number, because 31261401252111 - 2¹¹ = 31261401250063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31261401253111) 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, 220169700 + ... + 220311641.

It is an arithmetic number, because the mean of its divisors is an integer number (2673281264598).

Almost surely, 2^{31261401252111} is an apocalyptic number.

31261401252111 is a deficient number, since it is larger than the sum of its proper divisors (11511098981457).

31261401252111 is a wasteful number, since it uses less digits than its factorization.

31261401252111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440481962.

The product of its (nonzero) digits is 2880, while the sum is 30.

Adding to 31261401252111 its reverse (11125210416213), we get a palindrome (42386611668324).

The spelling of 31261401252111 in words is "thirty-one trillion, two hundred sixty-one billion, four hundred one million, two hundred fifty-two thousand, one hundred eleven".