121777269156 has 45 divisors (see below), whose sum is σ = 318366257979. Its totient is φ = 40590329256.

The previous prime is 121777269151. The next prime is 121777269161. The reversal of 121777269156 is 651962777121.

The square root of 121777269156 is 348966.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (121777269151) and next prime (121777269161).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (121777269151) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6271695 + ... + 6291081.

Almost surely, 2^121777269156 is an apocalyptic number.

121777269156 is the 348966-th square number.

It is an amenable number.

121777269156 is an abundant number, since it is smaller than the sum of its proper divisors (196588988823).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121777269156 is an frugal number, since it uses more digits than its factorization.

121777269156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38790 (or 19392 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The spelling of 121777269156 in words is "one hundred twenty-one billion, seven hundred seventy-seven million, two hundred sixty-nine thousand, one hundred fifty-six".