101129990 has 32 divisors (see below), whose sum is σ = 196481376. Its totient is φ = 37255680.

The previous prime is 101129971. The next prime is 101129999. The reversal of 101129990 is 99921101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101129999) 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, 114089 + ... + 114971.

It is an arithmetic number, because the mean of its divisors is an integer number (6140043).

Almost surely, 2^101129990 is an apocalyptic number.

101129990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101129990 is a deficient number, since it is larger than the sum of its proper divisors (95351386).

101129990 is a wasteful number, since it uses less digits than its factorization.

101129990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 101129990 is about 10056.3407857928. The cubic root of 101129990 is about 465.9006554484.

It can be divided in two parts, 10112 and 9990, that added together give a palindrome (20102).

The spelling of 101129990 in words is "one hundred one million, one hundred twenty-nine thousand, nine hundred ninety".