102021211993837 has 2 divisors, whose sum is σ = 102021211993838. Its totient is φ = 102021211993836.

The previous prime is 102021211993823. The next prime is 102021211993849. The reversal of 102021211993837 is 738399112120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96719770213641 + 5301441780196 = 9834621^2 + 2302486^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021211993837 - 2¹⁵ = 102021211961069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021211693837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010605996918 + 51010605996919.

It is an arithmetic number, because the mean of its divisors is an integer number (51010605996919).

Almost surely, 2^{102021211993837} is an apocalyptic number.

It is an amenable number.

102021211993837 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021211993837 is an equidigital number, since it uses as much as digits as its factorization.

102021211993837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 102021211993837 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, nine hundred ninety-three thousand, eight hundred thirty-seven".