21021231131119 has 2 divisors, whose sum is σ = 21021231131120. Its totient is φ = 21021231131118.

The previous prime is 21021231131083. The next prime is 21021231131123. The reversal of 21021231131119 is 91113113212012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21021231131119 - 2²⁷ = 21021096913391 is a prime.

It is a super-2 number, since 2×21021231131119² (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 (21021231131149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510615565559 + 10510615565560.

It is an arithmetic number, because the mean of its divisors is an integer number (10510615565560).

Almost surely, 2^{21021231131119} is an apocalyptic number.

21021231131119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021231131119 is an equidigital number, since it uses as much as digits as its factorization.

21021231131119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 21021231131119 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred nineteen".