122736477721 has 8 divisors (see below), whose sum is σ = 144193904064. Its totient is φ = 102995645520.

The previous prime is 122736477691. The next prime is 122736477739. The reversal of 122736477721 is 127774637221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122736477721 - 2¹³ = 122736469529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122736475721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429148381 + ... + 429148666.

It is an arithmetic number, because the mean of its divisors is an integer number (18024238008).

Almost surely, 2^122736477721 is an apocalyptic number.

122736477721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122736477721 is a deficient number, since it is larger than the sum of its proper divisors (21457426343).

122736477721 is a wasteful number, since it uses less digits than its factorization.

122736477721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858297071.

The product of its digits is 1382976, while the sum is 49.

The spelling of 122736477721 in words is "one hundred twenty-two billion, seven hundred thirty-six million, four hundred seventy-seven thousand, seven hundred twenty-one".