121955764967 has 4 divisors (see below), whose sum is σ = 122116022976. Its totient is φ = 121795506960.

The previous prime is 121955764927. The next prime is 121955764969. The reversal of 121955764967 is 769467559121.

It is a happy number.

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 121955764967 - 2¹⁴ = 121955748583 is a prime.

It is a super-2 number, since 2×121955764967² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121955764969) 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, 80127863 + ... + 80129384.

It is an arithmetic number, because the mean of its divisors is an integer number (30529005744).

Almost surely, 2^121955764967 is an apocalyptic number.

121955764967 is a deficient number, since it is larger than the sum of its proper divisors (160258009).

121955764967 is an equidigital number, since it uses as much as digits as its factorization.

121955764967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160258008.

The product of its digits is 28576800, while the sum is 62.

The spelling of 121955764967 in words is "one hundred twenty-one billion, nine hundred fifty-five million, seven hundred sixty-four thousand, nine hundred sixty-seven".