31300121211 has 16 divisors (see below), whose sum is σ = 42475614720. Its totient is φ = 20496267360.

The previous prime is 31300121207. The next prime is 31300121227. The reversal of 31300121211 is 11212100313.

It is a happy number.

It is not a de Polignac number, because 31300121211 - 2² = 31300121207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31300121911) 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, 146061 + ... + 289713.

It is an arithmetic number, because the mean of its divisors is an integer number (2654725920).

Almost surely, 2^31300121211 is an apocalyptic number.

31300121211 is a deficient number, since it is larger than the sum of its proper divisors (11175493509).

31300121211 is a wasteful number, since it uses less digits than its factorization.

31300121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144946.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31300121211 its reverse (11212100313), we get a palindrome (42512221524).

The spelling of 31300121211 in words is "thirty-one billion, three hundred million, one hundred twenty-one thousand, two hundred eleven".