102355721043 has 128 divisors (see below), whose sum is σ = 155585740800. Its totient is φ = 59615170560.

The previous prime is 102355721029. The next prime is 102355721059. The reversal of 102355721043 is 340127553201.

It is not a de Polignac number, because 102355721043 - 2²⁰ = 102354672467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102355720995 and 102355721013.

It is not an unprimeable number, because it can be changed into a prime (102355721063) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 514350258 + ... + 514350456.

It is an arithmetic number, because the mean of its divisors is an integer number (1215513600).

Almost surely, 2^102355721043 is an apocalyptic number.

102355721043 is a deficient number, since it is larger than the sum of its proper divisors (53230019757).

102355721043 is a wasteful number, since it uses less digits than its factorization.

102355721043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 102355721043 in words is "one hundred two billion, three hundred fifty-five million, seven hundred twenty-one thousand, forty-three".