121697651963 has 16 divisors (see below), whose sum is σ = 128769177600. Its totient is φ = 114693511680.

The previous prime is 121697651939. The next prime is 121697652017. The reversal of 121697651963 is 369156796121.

It is a cyclic number.

It is not a de Polignac number, because 121697651963 - 2¹⁰ = 121697650939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121697651899 and 121697651908.

It is not an unprimeable number, because it can be changed into a prime (121697651563) 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, 6392603 + ... + 6411611.

It is an arithmetic number, because the mean of its divisors is an integer number (8048073600).

Almost surely, 2^121697651963 is an apocalyptic number.

121697651963 is a deficient number, since it is larger than the sum of its proper divisors (7071525637).

121697651963 is a wasteful number, since it uses less digits than its factorization.

121697651963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20762.

The product of its digits is 3674160, while the sum is 56.

The spelling of 121697651963 in words is "one hundred twenty-one billion, six hundred ninety-seven million, six hundred fifty-one thousand, nine hundred sixty-three".