21023211112934 has 4 divisors (see below), whose sum is σ = 31534816669404. Its totient is φ = 10511605556466.

The previous prime is 21023211112933. The next prime is 21023211112957. The reversal of 21023211112934 is 43921111232012.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21023211112934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023211112933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255802778232 + ... + 5255802778235.

It is an arithmetic number, because the mean of its divisors is an integer number (7883704167351).

Almost surely, 2^{21023211112934} is an apocalyptic number.

21023211112934 is a deficient number, since it is larger than the sum of its proper divisors (10511605556470).

21023211112934 is a wasteful number, since it uses less digits than its factorization.

21023211112934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511605556469.

The product of its (nonzero) digits is 5184, while the sum is 32.

Adding to 21023211112934 its reverse (43921111232012), we get a palindrome (64944322344946).

The spelling of 21023211112934 in words is "twenty-one trillion, twenty-three billion, two hundred eleven million, one hundred twelve thousand, nine hundred thirty-four".