101090121 has 16 divisors (see below), whose sum is σ = 148021248. Its totient is φ = 60858000.

The previous prime is 101090111. The next prime is 101090123. The reversal of 101090121 is 121090101.

It is not a de Polignac number, because 101090121 - 2¹¹ = 101088073 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 101090121.

It is not an unprimeable number, because it can be changed into a prime (101090123) 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, 5161 + ... + 15126.

It is an arithmetic number, because the mean of its divisors is an integer number (9251328).

Almost surely, 2^101090121 is an apocalyptic number.

101090121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101090121 is a deficient number, since it is larger than the sum of its proper divisors (46931127).

101090121 is a wasteful number, since it uses less digits than its factorization.

101090121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20452.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 101090121 is about 10054.3583087137. The cubic root of 101090121 is about 465.8394225911.

The spelling of 101090121 in words is "one hundred one million, ninety thousand, one hundred twenty-one".