311222132020030 has 128 divisors (see below), whose sum is σ = 710675525468160. Its totient is φ = 95305550797440.

The previous prime is 311222132020003. The next prime is 311222132020061. The reversal of 311222132020030 is 30020231222113.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 311222132019983 and 311222132020010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77405539 + ... + 81326881.

It is an arithmetic number, because the mean of its divisors is an integer number (5552152542720).

Almost surely, 2^{311222132020030} is an apocalyptic number.

311222132020030 is an abundant number, since it is smaller than the sum of its proper divisors (399453393448130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311222132020030 is a wasteful number, since it uses less digits than its factorization.

311222132020030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923174.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 311222132020030 its reverse (30020231222113), we get a palindrome (341242363242143).

The spelling of 311222132020030 in words is "three hundred eleven trillion, two hundred twenty-two billion, one hundred thirty-two million, twenty thousand, thirty".