21002413121234 has 8 divisors (see below), whose sum is σ = 31519474554288. Its totient is φ = 10495921603140.

The previous prime is 21002413121177. The next prime is 21002413121237. The reversal of 21002413121234 is 43212131420012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21002413121234² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002413121237) 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, 2642473772 + ... + 2642481719.

It is an arithmetic number, because the mean of its divisors is an integer number (3939934319286).

Almost surely, 2^{21002413121234} is an apocalyptic number.

21002413121234 is a deficient number, since it is larger than the sum of its proper divisors (10517061433054).

21002413121234 is a wasteful number, since it uses less digits than its factorization.

21002413121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284957480.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21002413121234 its reverse (43212131420012), we get a palindrome (64214544541246).

The spelling of 21002413121234 in words is "twenty-one trillion, two billion, four hundred thirteen million, one hundred twenty-one thousand, two hundred thirty-four".