122145621 has 32 divisors (see below), whose sum is σ = 184063488. Its totient is φ = 71539200.

The previous prime is 122145619. The next prime is 122145641. The reversal of 122145621 is 126541221.

It is not a de Polignac number, because 122145621 - 2¹ = 122145619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122145591 and 122145600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122145641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66921 + ... + 68721.

It is an arithmetic number, because the mean of its divisors is an integer number (5751984).

Almost surely, 2^122145621 is an apocalyptic number.

It is an amenable number.

122145621 is a deficient number, since it is larger than the sum of its proper divisors (61917867).

122145621 is a wasteful number, since it uses less digits than its factorization.

122145621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901.

The product of its digits is 960, while the sum is 24.

The square root of 122145621 is about 11051.9510042345. The cubic root of 122145621 is about 496.1648193253.

Adding to 122145621 its reverse (126541221), we get a palindrome (248686842).

The spelling of 122145621 in words is "one hundred twenty-two million, one hundred forty-five thousand, six hundred twenty-one".