201578400122 has 32 divisors (see below), whose sum is σ = 335529492480. Its totient is φ = 90060862320.

The previous prime is 201578400097. The next prime is 201578400143. The reversal of 201578400122 is 221004875102.

It is a super-2 number, since 2×201578400122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127523 + ... + 647625.

It is an arithmetic number, because the mean of its divisors is an integer number (10485296640).

Almost surely, 2^201578400122 is an apocalyptic number.

201578400122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201578400122 is a deficient number, since it is larger than the sum of its proper divisors (133951092358).

201578400122 is a wasteful number, since it uses less digits than its factorization.

201578400122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520418.

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 201578400122 in words is "two hundred one billion, five hundred seventy-eight million, four hundred thousand, one hundred twenty-two".