21002240122034 has 16 divisors (see below), whose sum is σ = 32800779662616. Its totient is φ = 10077044438400.

The previous prime is 21002240122021. The next prime is 21002240122037. The reversal of 21002240122034 is 43022104220012.

It can be written as a sum of positive squares in 4 ways, for example, as 2064816680809 + 18937423441225 = 1436947^2 + 4351715^2 .

It is not an unprimeable number, because it can be changed into a prime (21002240122037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2099379257 + ... + 2099389260.

Almost surely, 2^{21002240122034} is an apocalyptic number.

21002240122034 is a deficient number, since it is larger than the sum of its proper divisors (11798539540582).

21002240122034 is a wasteful number, since it uses less digits than its factorization.

21002240122034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198768621.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21002240122034 its reverse (43022104220012), we get a palindrome (64024344342046).

The spelling of 21002240122034 in words is "twenty-one trillion, two billion, two hundred forty million, one hundred twenty-two thousand, thirty-four".