122015225021221 has 4 divisors (see below), whose sum is σ = 139445971452832. Its totient is φ = 104584478589612.

The previous prime is 122015225021203. The next prime is 122015225021233. The reversal of 122015225021221 is 122120522510221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 122015225021221 - 2⁹ = 122015225020709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122015225021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122015225021251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8715373215795 + ... + 8715373215808.

It is an arithmetic number, because the mean of its divisors is an integer number (34861492863208).

Almost surely, 2^{122015225021221} is an apocalyptic number.

It is an amenable number.

122015225021221 is a deficient number, since it is larger than the sum of its proper divisors (17430746431611).

122015225021221 is an equidigital number, since it uses as much as digits as its factorization.

122015225021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17430746431610.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 122015225021221 its reverse (122120522510221), we get a palindrome (244135747531442).

The spelling of 122015225021221 in words is "one hundred twenty-two trillion, fifteen billion, two hundred twenty-five million, twenty-one thousand, two hundred twenty-one".