21207411123274 has 16 divisors (see below), whose sum is σ = 33430664428128. Its totient is φ = 10077185925072.

The previous prime is 21207411123251. The next prime is 21207411123277. The reversal of 21207411123274 is 47232111470212.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (21207411123277) 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, 3332399572 + ... + 3332405935.

It is an arithmetic number, because the mean of its divisors is an integer number (2089416526758).

Almost surely, 2^{21207411123274} is an apocalyptic number.

21207411123274 is a deficient number, since it is larger than the sum of its proper divisors (12223253304854).

21207411123274 is a wasteful number, since it uses less digits than its factorization.

21207411123274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664805589.

The product of its (nonzero) digits is 37632, while the sum is 37.

Adding to 21207411123274 its reverse (47232111470212), we get a palindrome (68439522593486).

The spelling of 21207411123274 in words is "twenty-one trillion, two hundred seven billion, four hundred eleven million, one hundred twenty-three thousand, two hundred seventy-four".