121122309 has 32 divisors (see below), whose sum is σ = 202245120. Its totient is φ = 62640000.

The previous prime is 121122307. The next prime is 121122329. The reversal of 121122309 is 903221121.

It is not a de Polignac number, because 121122309 - 2¹ = 121122307 is a prime.

It is a super-2 number, since 2×121122309² = 29341227474982962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56937 + ... + 59025.

It is an arithmetic number, because the mean of its divisors is an integer number (6320160).

Almost surely, 2^121122309 is an apocalyptic number.

It is an amenable number.

121122309 is a deficient number, since it is larger than the sum of its proper divisors (81122811).

121122309 is a wasteful number, since it uses less digits than its factorization.

121122309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 121122309 is about 11005.5580957987. The cubic root of 121122309 is about 494.7753413749.

The spelling of 121122309 in words is "one hundred twenty-one million, one hundred twenty-two thousand, three hundred nine".