203213129989 has 2 divisors, whose sum is σ = 203213129990. Its totient is φ = 203213129988.

The previous prime is 203213129983. The next prime is 203213130151. The reversal of 203213129989 is 989921312302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180850320225 + 22362809764 = 425265^2 + 149542^2 .

It is a cyclic number.

It is not a de Polignac number, because 203213129989 - 2²¹ = 203211032837 is a prime.

It is a super-2 number, since 2×203213129989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203213129983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101606564994 + 101606564995.

It is an arithmetic number, because the mean of its divisors is an integer number (101606564995).

Almost surely, 2^203213129989 is an apocalyptic number.

It is an amenable number.

203213129989 is a deficient number, since it is larger than the sum of its proper divisors (1).

203213129989 is an equidigital number, since it uses as much as digits as its factorization.

203213129989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 203213129989 in words is "two hundred three billion, two hundred thirteen million, one hundred twenty-nine thousand, nine hundred eighty-nine".