2101162890 has 16 divisors (see below), whose sum is σ = 5042791008. Its totient is φ = 560310096.

The previous prime is 2101162859. The next prime is 2101162901. The reversal of 2101162890 is 982611012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 70038763 = 2101162890 / (2 + 1 + 0 + 1 + 1 + 6 + 2 + 8 + 9 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35019352 + ... + 35019411.

It is an arithmetic number, because the mean of its divisors is an integer number (315174438).

Almost surely, 2^2101162890 is an apocalyptic number.

2101162890 is an abundant number, since it is smaller than the sum of its proper divisors (2941628118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101162890 is a wasteful number, since it uses less digits than its factorization.

2101162890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70038773.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 2101162890 is about 45838.4433636222. The cubic root of 2101162890 is about 1280.8154979890.

The spelling of 2101162890 in words is "two billion, one hundred one million, one hundred sixty-two thousand, eight hundred ninety".