202740121900 has 18 divisors (see below), whose sum is σ = 439946064740. Its totient is φ = 81096048720.

The previous prime is 202740121897. The next prime is 202740121949. The reversal of 202740121900 is 9121047202.

It is a super-2 number, since 2×202740121900² (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 5 ways as a sum of consecutive naturals, for example, 1013700510 + ... + 1013700709.

Almost surely, 2^202740121900 is an apocalyptic number.

202740121900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202740121900 is an abundant number, since it is smaller than the sum of its proper divisors (237205942840).

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

202740121900 is a wasteful number, since it uses less digits than its factorization.

202740121900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027401233 (or 2027401226 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 202740121900 in words is "two hundred two billion, seven hundred forty million, one hundred twenty-one thousand, nine hundred".