2121403101397 has 2 divisors, whose sum is σ = 2121403101398. Its totient is φ = 2121403101396.

The previous prime is 2121403101299. The next prime is 2121403101431. The reversal of 2121403101397 is 7931013041212.

It is a happy number.

It is an a-pointer prime, because the next prime (2121403101431) can be obtained adding 2121403101397 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1792837982961 + 328565118436 = 1338969^2 + 573206^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121403101397 - 2⁷ = 2121403101269 is a prime.

It is a super-2 number, since 2×2121403101397² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121403101497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060701550698 + 1060701550699.

It is an arithmetic number, because the mean of its divisors is an integer number (1060701550699).

Almost surely, 2^{2121403101397} is an apocalyptic number.

It is an amenable number.

2121403101397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121403101397 is an equidigital number, since it uses as much as digits as its factorization.

2121403101397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 2121403101397 in words is "two trillion, one hundred twenty-one billion, four hundred three million, one hundred one thousand, three hundred ninety-seven".