2121100197 has 16 divisors (see below), whose sum is σ = 2925232128. Its totient is φ = 1365701040.

The previous prime is 2121100187. The next prime is 2121100211. The reversal of 2121100197 is 7910011212.

It is not a de Polignac number, because 2121100197 - 2¹⁰ = 2121099173 is a prime.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24108 + ... + 69450.

It is an arithmetic number, because the mean of its divisors is an integer number (182827008).

Almost surely, 2^2121100197 is an apocalyptic number.

It is an amenable number.

2121100197 is a deficient number, since it is larger than the sum of its proper divisors (804131931).

2121100197 is a wasteful number, since it uses less digits than its factorization.

2121100197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45880.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 2121100197 is about 46055.4035591916. The cubic root of 2121100197 is about 1284.8538437935.

The spelling of 2121100197 in words is "two billion, one hundred twenty-one million, one hundred thousand, one hundred ninety-seven".