21311201011234 has 16 divisors (see below), whose sum is σ = 33757461766080. Its totient is φ = 10062320322960.

The previous prime is 21311201011229. The next prime is 21311201011283. The reversal of 21311201011234 is 43211010211312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901629789 + ... + 901653424.

It is an arithmetic number, because the mean of its divisors is an integer number (2109841360380).

Almost surely, 2^{21311201011234} is an apocalyptic number.

21311201011234 is a deficient number, since it is larger than the sum of its proper divisors (12446260754846).

21311201011234 is a wasteful number, since it uses less digits than its factorization.

21311201011234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803283545.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21311201011234 its reverse (43211010211312), we get a palindrome (64522211222546).

The spelling of 21311201011234 in words is "twenty-one trillion, three hundred eleven billion, two hundred one million, eleven thousand, two hundred thirty-four".