121890539153 has 4 divisors (see below), whose sum is σ = 122258788848. Its totient is φ = 121522289460.

The previous prime is 121890539093. The next prime is 121890539167. The reversal of 121890539153 is 351935098121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121890539153 - 2¹⁰ = 121890538129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121890539098 and 121890539107.

It is not an unprimeable number, because it can be changed into a prime (121890535153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184124351 + ... + 184125012.

It is an arithmetic number, because the mean of its divisors is an integer number (30564697212).

Almost surely, 2^121890539153 is an apocalyptic number.

It is an amenable number.

121890539153 is a deficient number, since it is larger than the sum of its proper divisors (368249695).

121890539153 is an equidigital number, since it uses as much as digits as its factorization.

121890539153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368249694.

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 121890539153 in words is "one hundred twenty-one billion, eight hundred ninety million, five hundred thirty-nine thousand, one hundred fifty-three".