21101214113951 has 2 divisors, whose sum is σ = 21101214113952. Its totient is φ = 21101214113950.

The previous prime is 21101214113893. The next prime is 21101214113963. The reversal of 21101214113951 is 15931141210112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101214113951 - 2¹⁸ = 21101213851807 is a prime.

It is a super-2 number, since 2×21101214113951² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101214118951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550607056975 + 10550607056976.

It is an arithmetic number, because the mean of its divisors is an integer number (10550607056976).

Almost surely, 2^{21101214113951} is an apocalyptic number.

21101214113951 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101214113951 is an equidigital number, since it uses as much as digits as its factorization.

21101214113951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 32.

The spelling of 21101214113951 in words is "twenty-one trillion, one hundred one billion, two hundred fourteen million, one hundred thirteen thousand, nine hundred fifty-one".