2101156 has 12 divisors (see below), whose sum is σ = 3776668. Its totient is φ = 1022112.

The previous prime is 2101139. The next prime is 2101157. The reversal of 2101156 is 6511012.

2101156 = T₈₉ + T₉₀ + ... + T₂₃₆.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2005056 + 96100 = 1416^2 + 310^2 .

It is not an unprimeable number, because it can be changed into a prime (2101157) 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, 6951 + ... + 7246.

2^2101156 is an apocalyptic number.

It is an amenable number.

2101156 is a deficient number, since it is larger than the sum of its proper divisors (1675512).

2101156 is a wasteful number, since it uses less digits than its factorization.

2101156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14238 (or 14236 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2101156 is about 1449.5364776369. The cubic root of 2101156 is about 128.0814097998.

Adding to 2101156 its reverse (6511012), we get a palindrome (8612168).

The spelling of 2101156 in words is "two million, one hundred one thousand, one hundred fifty-six".