101229090 has 32 divisors (see below), whose sum is σ = 243262656. Its totient is φ = 26959680.

The previous prime is 101229059. The next prime is 101229091. The reversal of 101229090 is 90922101.

It is a self number, because there is not a number n which added to its sum of digits gives 101229090.

It is not an unprimeable number, because it can be changed into a prime (101229091) 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, 28725 + ... + 32055.

It is an arithmetic number, because the mean of its divisors is an integer number (7601958).

Almost surely, 2^101229090 is an apocalyptic number.

101229090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101229090 is an abundant number, since it is smaller than the sum of its proper divisors (142033566).

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

101229090 is a wasteful number, since it uses less digits than its factorization.

101229090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 101229090 is about 10061.2668188454. The cubic root of 101229090 is about 466.0527886314.

The spelling of 101229090 in words is "one hundred one million, two hundred twenty-nine thousand, ninety".