2101121010 has 48 divisors (see below), whose sum is σ = 5465176704. Its totient is φ = 560066976.

The previous prime is 2101120991. The next prime is 2101121017. The reversal of 2101121010 is 101211012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101120983 and 2101121001.

It is not an unprimeable number, because it can be changed into a prime (2101121017) 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, 422599 + ... + 427541.

It is an arithmetic number, because the mean of its divisors is an integer number (113857848).

Almost surely, 2^2101121010 is an apocalyptic number.

2101121010 is an abundant number, since it is smaller than the sum of its proper divisors (3364055694).

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

2101121010 is a wasteful number, since it uses less digits than its factorization.

2101121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9679 (or 9676 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2101121010 is about 45837.9865395504. The cubic root of 2101121010 is about 1280.8069882713.

Adding to 2101121010 its reverse (101211012), we get a palindrome (2202332022).

The spelling of 2101121010 in words is "two billion, one hundred one million, one hundred twenty-one thousand, ten".