12021400203997 has 2 divisors, whose sum is σ = 12021400203998. Its totient is φ = 12021400203996.

The previous prime is 12021400203971. The next prime is 12021400204027. The reversal of 12021400203997 is 79930200412021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7152784431961 + 4868615772036 = 2674469^2 + 2206494^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021400203997 - 2¹⁵ = 12021400171229 is a prime.

It is a super-2 number, since 2×12021400203997² (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 (12021400203797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010700101998 + 6010700101999.

It is an arithmetic number, because the mean of its divisors is an integer number (6010700101999).

Almost surely, 2^{12021400203997} is an apocalyptic number.

It is an amenable number.

12021400203997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021400203997 is an equidigital number, since it uses as much as digits as its factorization.

12021400203997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 12021400203997 in words is "twelve trillion, twenty-one billion, four hundred million, two hundred three thousand, nine hundred ninety-seven".