122744777221 has 16 divisors (see below), whose sum is σ = 141801891840. Its totient is φ = 105006100480.

The previous prime is 122744777219. The next prime is 122744777231. The reversal of 122744777221 is 122777447221.

It is not a de Polignac number, because 122744777221 - 2¹ = 122744777219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122744777231) 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, 1257660 + ... + 1351738.

It is an arithmetic number, because the mean of its divisors is an integer number (8862618240).

Almost surely, 2^122744777221 is an apocalyptic number.

122744777221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122744777221 is a deficient number, since it is larger than the sum of its proper divisors (19057114619).

122744777221 is a wasteful number, since it uses less digits than its factorization.

122744777221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101084.

The product of its digits is 614656, while the sum is 46.

The spelling of 122744777221 in words is "one hundred twenty-two billion, seven hundred forty-four million, seven hundred seventy-seven thousand, two hundred twenty-one".