2121111010 has 8 divisors (see below), whose sum is σ = 3817999836. Its totient is φ = 848444400.

The previous prime is 2121111007. The next prime is 2121111019. The reversal of 2121111010 is 101111212.

It can be written as a sum of positive squares in 2 ways, for example, as 2039515921 + 81595089 = 45161^2 + 9033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2121111010² = 8998223833486440200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 212111101 = 2121111010 / (2 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (2121111019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106055541 + ... + 106055560.

Almost surely, 2^2121111010 is an apocalyptic number.

2121111010 is a deficient number, since it is larger than the sum of its proper divisors (1696888826).

2121111010 is a wasteful number, since it uses less digits than its factorization.

2121111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212111108.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2121111010 is about 46055.5209502618. The cubic root of 2121111010 is about 1284.8560271103.

Adding to 2121111010 its reverse (101111212), we get a palindrome (2222222222).

The spelling of 2121111010 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, ten".