201031122129990 has 32 divisors (see below), whose sum is σ = 482481530277120. Its totient is φ = 53607539549664.

The previous prime is 201031122129967. The next prime is 201031122129991. The reversal of 201031122129990 is 99921221130102.

It is a super-2 number, since 2×201031122129990² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201031122129991) 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, 45326434 + ... + 49563573.

It is an arithmetic number, because the mean of its divisors is an integer number (15077547821160).

Almost surely, 2^{201031122129990} is an apocalyptic number.

201031122129990 is an abundant number, since it is smaller than the sum of its proper divisors (281450408147130).

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

201031122129990 is a wasteful number, since it uses less digits than its factorization.

201031122129990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94960636.

The product of its (nonzero) digits is 34992, while the sum is 42.

The spelling of 201031122129990 in words is "two hundred one trillion, thirty-one billion, one hundred twenty-two million, one hundred twenty-nine thousand, nine hundred ninety".