122211220021 has 8 divisors (see below), whose sum is σ = 133323861888. Its totient is φ = 111099000000.

The previous prime is 122211219967. The next prime is 122211220067. The reversal of 122211220021 is 120022112221.

It is a happy number.

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 122211220021 - 2³³ = 113621285429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122211219977 and 122211220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211220421) 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, 1069396 + ... + 1178146.

It is an arithmetic number, because the mean of its divisors is an integer number (16665482736).

Almost surely, 2^122211220021 is an apocalyptic number.

122211220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122211220021 is a deficient number, since it is larger than the sum of its proper divisors (11112641867).

122211220021 is a wasteful number, since it uses less digits than its factorization.

122211220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210923.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122211220021 its reverse (120022112221), we get a palindrome (242233332242).

It can be divided in two parts, 1222112200 and 21, that added together give a palindrome (1222112221).

The spelling of 122211220021 in words is "one hundred twenty-two billion, two hundred eleven million, two hundred twenty thousand, twenty-one".