121120389 has 24 divisors (see below), whose sum is σ = 191233952. Its totient is φ = 73418400.

The previous prime is 121120387. The next prime is 121120409. The reversal of 121120389 is 983021121.

It is not a de Polignac number, because 121120389 - 2¹ = 121120387 is a prime.

It is a super-2 number, since 2×121120389² = 29340297263022642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114 + ... + 15564.

Almost surely, 2^121120389 is an apocalyptic number.

It is an amenable number.

121120389 is a deficient number, since it is larger than the sum of its proper divisors (70113563).

121120389 is a wasteful number, since it uses less digits than its factorization.

121120389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15537 (or 15534 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 121120389 is about 11005.4708668007. The cubic root of 121120389 is about 494.7727270102.

The spelling of 121120389 in words is "one hundred twenty-one million, one hundred twenty thousand, three hundred eighty-nine".