2123402221242 has 12 divisors (see below), whose sum is σ = 4600704812730. Its totient is φ = 707800740408.

The previous prime is 2123402221229. The next prime is 2123402221243. The reversal of 2123402221242 is 2421222043212.

2123402221242 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 402 + 2 + 212 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1988074620081 + 135327601161 = 1409991^2 + 367869^2 .

It is not an unprimeable number, because it can be changed into a prime (2123402221243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58983395017 + ... + 58983395052.

Almost surely, 2^{2123402221242} is an apocalyptic number.

2123402221242 is an abundant number, since it is smaller than the sum of its proper divisors (2477302591488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123402221242 is a wasteful number, since it uses less digits than its factorization.

2123402221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117966790077 (or 117966790074 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 2123402221242 its reverse (2421222043212), we get a palindrome (4544624264454).

The spelling of 2123402221242 in words is "two trillion, one hundred twenty-three billion, four hundred two million, two hundred twenty-one thousand, two hundred forty-two".