121564433 has 16 divisors (see below), whose sum is σ = 133954560. Its totient is φ = 109804800.

The previous prime is 121564393. The next prime is 121564441. The reversal of 121564433 is 334465121.

It is a cyclic number.

It is not a de Polignac number, because 121564433 - 2⁶ = 121564369 is a prime.

It is a super-2 number, since 2×121564433² = 29555822741222978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 121564396 and 121564405.

It is not an unprimeable number, because it can be changed into a prime (121564493) 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, 93518 + ... + 94808.

It is an arithmetic number, because the mean of its divisors is an integer number (8372160).

Almost surely, 2^121564433 is an apocalyptic number.

It is an amenable number.

121564433 is a deficient number, since it is larger than the sum of its proper divisors (12390127).

121564433 is a wasteful number, since it uses less digits than its factorization.

121564433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528.

The product of its digits is 8640, while the sum is 29.

The square root of 121564433 is about 11025.6261953687. The cubic root of 121564433 is about 495.3766245692.

The spelling of 121564433 in words is "one hundred twenty-one million, five hundred sixty-four thousand, four hundred thirty-three".