101203101990 has 48 divisors (see below), whose sum is σ = 264106299600. Its totient is φ = 26887162176.

The previous prime is 101203101977. The next prime is 101203101991. The reversal of 101203101990 is 99101302101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101203101991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2065900 + ... + 2114319.

It is an arithmetic number, because the mean of its divisors is an integer number (5502214575).

Almost surely, 2^101203101990 is an apocalyptic number.

101203101990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101203101990 is an abundant number, since it is smaller than the sum of its proper divisors (162903197610).

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

101203101990 is a wasteful number, since it uses less digits than its factorization.

101203101990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180501 (or 4180498 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The spelling of 101203101990 in words is "one hundred one billion, two hundred three million, one hundred one thousand, nine hundred ninety".