122153601021 has 4 divisors (see below), whose sum is σ = 162871468032. Its totient is φ = 81435734012.

The previous prime is 122153601007. The next prime is 122153601023. The reversal of 122153601021 is 120106351221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120106351221 = 3 ⋅40035450407.

It is a cyclic number.

It is not a de Polignac number, because 122153601021 - 2⁶ = 122153600957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122153600982 and 122153601000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122153601023) 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, 20358933501 + ... + 20358933506.

It is an arithmetic number, because the mean of its divisors is an integer number (40717867008).

Almost surely, 2^122153601021 is an apocalyptic number.

It is an amenable number.

122153601021 is a deficient number, since it is larger than the sum of its proper divisors (40717867011).

122153601021 is an equidigital number, since it uses as much as digits as its factorization.

122153601021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40717867010.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 122153601021 its reverse (120106351221), we get a palindrome (242259952242).

The spelling of 122153601021 in words is "one hundred twenty-two billion, one hundred fifty-three million, six hundred one thousand, twenty-one".