202102101121243 has 2 divisors, whose sum is σ = 202102101121244. Its totient is φ = 202102101121242.

The previous prime is 202102101121087. The next prime is 202102101121303. The reversal of 202102101121243 is 342121101201202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202102101121243 is a prime.

It is a super-2 number, since 2×202102101121243² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202102101124243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051050560621 + 101051050560622.

It is an arithmetic number, because the mean of its divisors is an integer number (101051050560622).

Almost surely, 2^{202102101121243} is an apocalyptic number.

202102101121243 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102101121243 is an equidigital number, since it uses as much as digits as its factorization.

202102101121243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 202102101121243 its reverse (342121101201202), we get a palindrome (544223202322445).

The spelling of 202102101121243 in words is "two hundred two trillion, one hundred two billion, one hundred one million, one hundred twenty-one thousand, two hundred forty-three".