31120221148 has 48 divisors (see below), whose sum is σ = 57906515520. Its totient is φ = 14583361536.

The previous prime is 31120221089. The next prime is 31120221149. The reversal of 31120221148 is 84112202113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120221149) 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, 27563848 + ... + 27564976.

It is an arithmetic number, because the mean of its divisors is an integer number (1206385740).

Almost surely, 2^31120221148 is an apocalyptic number.

It is an amenable number.

31120221148 is a deficient number, since it is larger than the sum of its proper divisors (26786294372).

31120221148 is a wasteful number, since it uses less digits than its factorization.

31120221148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2492 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 31120221148 in words is "thirty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred forty-eight".