101221099943 has 2 divisors, whose sum is σ = 101221099944. Its totient is φ = 101221099942.

The previous prime is 101221099937. The next prime is 101221099961. The reversal of 101221099943 is 349990122101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101221099943 - 2⁴ = 101221099927 is a prime.

It is a super-2 number, since 2×101221099943² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101221099943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221059943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610549971 + 50610549972.

It is an arithmetic number, because the mean of its divisors is an integer number (50610549972).

Almost surely, 2^101221099943 is an apocalyptic number.

101221099943 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221099943 is an equidigital number, since it uses as much as digits as its factorization.

101221099943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 101221099943 in words is "one hundred one billion, two hundred twenty-one million, ninety-nine thousand, nine hundred forty-three".