102012202121189 has 2 divisors, whose sum is σ = 102012202121190. Its totient is φ = 102012202121188.

The previous prime is 102012202121177. The next prime is 102012202121233. The reversal of 102012202121189 is 981121202210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54269491769089 + 47742710352100 = 7366783^2 + 6909610^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012202121189 - 2⁴ = 102012202121173 is a prime.

It is a super-2 number, since 2×102012202121189² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102012202120189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006101060594 + 51006101060595.

It is an arithmetic number, because the mean of its divisors is an integer number (51006101060595).

Almost surely, 2^{102012202121189} is an apocalyptic number.

It is an amenable number.

102012202121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012202121189 is an equidigital number, since it uses as much as digits as its factorization.

102012202121189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 102012202121189 in words is "one hundred two trillion, twelve billion, two hundred two million, one hundred twenty-one thousand, one hundred eighty-nine".