122040552421 has 4 divisors (see below), whose sum is σ = 122188840672. Its totient is φ = 121892264172.

The previous prime is 122040552409. The next prime is 122040552427. The reversal of 122040552421 is 124255040221.

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 a cyclic number.

It is not a de Polignac number, because 122040552421 - 2¹⁹ = 122040028133 is a prime.

It is a super-2 number, since 2×122040552421² (a number of 23 digits) contains 22 as substring.

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 122040552421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122040552427) 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, 74142891 + ... + 74144536.

It is an arithmetic number, because the mean of its divisors is an integer number (30547210168).

Almost surely, 2^122040552421 is an apocalyptic number.

It is an amenable number.

122040552421 is a deficient number, since it is larger than the sum of its proper divisors (148288251).

122040552421 is an equidigital number, since it uses as much as digits as its factorization.

122040552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148288250.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 122040552421 its reverse (124255040221), we get a palindrome (246295592642).

The spelling of 122040552421 in words is "one hundred twenty-two billion, forty million, five hundred fifty-two thousand, four hundred twenty-one".