121820910 has 32 divisors (see below), whose sum is σ = 294343200. Its totient is φ = 32266368.

The previous prime is 121820869. The next prime is 121820927. The reversal of 121820910 is 19028121.

It is a super-2 number, since 2×121820910² = 29680668226456200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9157 + ... + 18096.

It is an arithmetic number, because the mean of its divisors is an integer number (9198225).

Almost surely, 2^121820910 is an apocalyptic number.

121820910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121820910 is an abundant number, since it is smaller than the sum of its proper divisors (172522290).

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

121820910 is a wasteful number, since it uses less digits than its factorization.

121820910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27412.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 121820910 is about 11037.2510164443. The cubic root of 121820910 is about 495.7247622054.

The spelling of 121820910 in words is "one hundred twenty-one million, eight hundred twenty thousand, nine hundred ten".