2121233031402 has 128 divisors (see below), whose sum is σ = 4529226240000. Its totient is φ = 660429469440.

The previous prime is 2121233031361. The next prime is 2121233031409. The reversal of 2121233031402 is 2041303321212.

It is not an unprimeable number, because it can be changed into a prime (2121233031409) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1723178127 + ... + 1723179357.

It is an arithmetic number, because the mean of its divisors is an integer number (35384580000).

Almost surely, 2^{2121233031402} is an apocalyptic number.

2121233031402 is an abundant number, since it is smaller than the sum of its proper divisors (2407993208598).

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

2121233031402 is a wasteful number, since it uses less digits than its factorization.

2121233031402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 2121233031402 its reverse (2041303321212), we get a palindrome (4162536352614).

The spelling of 2121233031402 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, thirty-one thousand, four hundred two".