31220033010100 has 72 divisors (see below), whose sum is σ = 73919288612736. Its totient is φ = 11350749120000.

The previous prime is 31220033010073. The next prime is 31220033010139. The reversal of 31220033010100 is 101033002213.

It is a super-2 number, since 2×31220033010100² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3797260 + ... + 8766940.

It is an arithmetic number, because the mean of its divisors is an integer number (1026656786288).

Almost surely, 2^{31220033010100} is an apocalyptic number.

It is an amenable number.

31220033010100 is an abundant number, since it is smaller than the sum of its proper divisors (42699255602636).

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

31220033010100 is a wasteful number, since it uses less digits than its factorization.

31220033010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975417 (or 4975410 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31220033010100 its reverse (101033002213), we get a palindrome (31321066012313).

The spelling of 31220033010100 in words is "thirty-one trillion, two hundred twenty billion, thirty-three million, ten thousand, one hundred".