121636406132 has 24 divisors (see below), whose sum is σ = 218642408040. Its totient is φ = 59167532160.

The previous prime is 121636406119. The next prime is 121636406137. The reversal of 121636406132 is 231604636121.

It can be written as a sum of positive squares in 4 ways, for example, as 46896501136 + 74739904996 = 216556^2 + 273386^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121636406092 and 121636406101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121636406137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356794 + ... + 1443662.

It is an arithmetic number, because the mean of its divisors is an integer number (9110100335).

Almost surely, 2^121636406132 is an apocalyptic number.

It is an amenable number.

121636406132 is a deficient number, since it is larger than the sum of its proper divisors (97006001908).

121636406132 is a wasteful number, since it uses less digits than its factorization.

121636406132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96371 (or 96369 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 121636406132 in words is "one hundred twenty-one billion, six hundred thirty-six million, four hundred six thousand, one hundred thirty-two".