121826190 has 16 divisors (see below), whose sum is σ = 292382928. Its totient is φ = 32486976.

The previous prime is 121826189. The next prime is 121826219. The reversal of 121826190 is 91628121.

It is a happy number.

It is a super-2 number, since 2×121826190² = 29683241139832200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4060873 = 121826190 / (1 + 2 + 1 + 8 + 2 + 6 + 1 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030407 + ... + 2030466.

It is an arithmetic number, because the mean of its divisors is an integer number (18273933).

Almost surely, 2^121826190 is an apocalyptic number.

121826190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121826190 is an abundant number, since it is smaller than the sum of its proper divisors (170556738).

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

121826190 is a wasteful number, since it uses less digits than its factorization.

121826190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060883.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 121826190 is about 11037.4902038462. The cubic root of 121826190 is about 495.7319240545.

The spelling of 121826190 in words is "one hundred twenty-one million, eight hundred twenty-six thousand, one hundred ninety".