102001212315021 has 8 divisors (see below), whose sum is σ = 136005805468384. Its totient is φ = 67998713685840.

The previous prime is 102001212315017. The next prime is 102001212315059. The reversal of 102001212315021 is 120513212100201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102001212315021 - 2² = 102001212315017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001212315001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523517410 + ... + 523712211.

It is an arithmetic number, because the mean of its divisors is an integer number (17000725683548).

Almost surely, 2^{102001212315021} is an apocalyptic number.

It is an amenable number.

102001212315021 is a deficient number, since it is larger than the sum of its proper divisors (34004593153363).

102001212315021 is a wasteful number, since it uses less digits than its factorization.

102001212315021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047262091.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 102001212315021 its reverse (120513212100201), we get a palindrome (222514424415222).

The spelling of 102001212315021 in words is "one hundred two trillion, one billion, two hundred twelve million, three hundred fifteen thousand, twenty-one".