2161111010 has 32 divisors (see below), whose sum is σ = 3914352000. Its totient is φ = 859052160.

The previous prime is 2161111003. The next prime is 2161111067. The reversal of 2161111010 is 101111612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1271141 + ... + 1272839.

It is an arithmetic number, because the mean of its divisors is an integer number (122323500).

Almost surely, 2^2161111010 is an apocalyptic number.

2161111010 is a deficient number, since it is larger than the sum of its proper divisors (1753240990).

2161111010 is a wasteful number, since it uses less digits than its factorization.

2161111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 2161111010 is about 46487.7511824351. The cubic root of 2161111010 is about 1292.8824055205.

Adding to 2161111010 its reverse (101111612), we get a palindrome (2262222622).

The spelling of 2161111010 in words is "two billion, one hundred sixty-one million, one hundred eleven thousand, ten".