189102220121 has 8 divisors (see below), whose sum is σ = 191857932288. Its totient is φ = 186349072000.

The previous prime is 189102220117. The next prime is 189102220169. The reversal of 189102220121 is 121022201981.

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

It is a cyclic number.

It is not a de Polignac number, because 189102220121 - 2² = 189102220117 is a prime.

It is a super-2 number, since 2×189102220121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189102420121) 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, 492185 + ... + 787686.

It is an arithmetic number, because the mean of its divisors is an integer number (23982241536).

Almost surely, 2^189102220121 is an apocalyptic number.

It is an amenable number.

189102220121 is a deficient number, since it is larger than the sum of its proper divisors (2755712167).

189102220121 is a wasteful number, since it uses less digits than its factorization.

189102220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282023.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 189102220121 in words is "one hundred eighty-nine billion, one hundred two million, two hundred twenty thousand, one hundred twenty-one".