2102120121 has 8 divisors (see below), whose sum is σ = 2924688960. Its totient is φ = 1340482352.

The previous prime is 2102120093. The next prime is 2102120147. The reversal of 2102120121 is 1210212012.

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 2102120121 - 2¹⁵ = 2102087353 is a prime.

It is a super-2 number, since 2×2102120121² = 8837818006226109282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2102120097 and 2102120106.

It is not an unprimeable number, because it can be changed into a prime (2102120221) 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, 15232686 + ... + 15232823.

It is an arithmetic number, because the mean of its divisors is an integer number (365586120).

Almost surely, 2^2102120121 is an apocalyptic number.

It is an amenable number.

2102120121 is a deficient number, since it is larger than the sum of its proper divisors (822568839).

2102120121 is a wasteful number, since it uses less digits than its factorization.

2102120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30465535.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2102120121 is about 45848.8835305725. The cubic root of 2102120121 is about 1281.0099696901.

Adding to 2102120121 its reverse (1210212012), we get a palindrome (3312332133).

The spelling of 2102120121 in words is "two billion, one hundred two million, one hundred twenty thousand, one hundred twenty-one".