122000021221 has 8 divisors (see below), whose sum is σ = 131422957400. Its totient is φ = 112582559232.

The previous prime is 122000021219. The next prime is 122000021233. The reversal of 122000021221 is 122120000221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13791918721 + 108208102500 = 117439^2 + 328950^2 .

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

It is not a de Polignac number, because 122000021221 - 2¹ = 122000021219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122000021201) 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, 1322196 + ... + 1411453.

It is an arithmetic number, because the mean of its divisors is an integer number (16427869675).

Almost surely, 2^122000021221 is an apocalyptic number.

It is an amenable number.

122000021221 is a deficient number, since it is larger than the sum of its proper divisors (9422936179).

122000021221 is a wasteful number, since it uses less digits than its factorization.

122000021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737095.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 122000021221 its reverse (122120000221), we get a palindrome (244120021442).

The spelling of 122000021221 in words is "one hundred twenty-two billion, twenty-one thousand, two hundred twenty-one".