121006402051 has 4 divisors (see below), whose sum is σ = 121807769104. Its totient is φ = 120205035000.

The previous prime is 121006402043. The next prime is 121006402079. The reversal of 121006402051 is 150204600121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121006402051 - 2³ = 121006402043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121006402021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400683300 + ... + 400683601.

It is an arithmetic number, because the mean of its divisors is an integer number (30451942276).

Almost surely, 2^121006402051 is an apocalyptic number.

121006402051 is a deficient number, since it is larger than the sum of its proper divisors (801367053).

121006402051 is an equidigital number, since it uses as much as digits as its factorization.

121006402051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801367052.

The product of its (nonzero) digits is 480, while the sum is 22.

The spelling of 121006402051 in words is "one hundred twenty-one billion, six million, four hundred two thousand, fifty-one".