121406905230261 has 16 divisors (see below), whose sum is σ = 185107750376064. Its totient is φ = 69335342443584.

The previous prime is 121406905230257. The next prime is 121406905230293. The reversal of 121406905230261 is 162032509604121.

It is not a de Polignac number, because 121406905230261 - 2² = 121406905230257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121406905230211) 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, 1667961646 + ... + 1668034431.

It is an arithmetic number, because the mean of its divisors is an integer number (11569234398504).

Almost surely, 2^{121406905230261} is an apocalyptic number.

It is an amenable number.

121406905230261 is a deficient number, since it is larger than the sum of its proper divisors (63700845145803).

121406905230261 is a wasteful number, since it uses less digits than its factorization.

121406905230261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335997820.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 121406905230261 in words is "one hundred twenty-one trillion, four hundred six billion, nine hundred five million, two hundred thirty thousand, two hundred sixty-one".