214012231721 has 2 divisors, whose sum is σ = 214012231722. Its totient is φ = 214012231720.

The previous prime is 214012231717. The next prime is 214012231729. The reversal of 214012231721 is 127132210412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211448227225 + 2564004496 = 459835^2 + 50636^2 .

It is a cyclic number.

It is not a de Polignac number, because 214012231721 - 2² = 214012231717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (214012231729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107006115860 + 107006115861.

It is an arithmetic number, because the mean of its divisors is an integer number (107006115861).

Almost surely, 2^214012231721 is an apocalyptic number.

It is an amenable number.

214012231721 is a deficient number, since it is larger than the sum of its proper divisors (1).

214012231721 is an equidigital number, since it uses as much as digits as its factorization.

214012231721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The spelling of 214012231721 in words is "two hundred fourteen billion, twelve million, two hundred thirty-one thousand, seven hundred twenty-one".