2101221131 has 8 divisors (see below), whose sum is σ = 2228054544. Its totient is φ = 1974746880.

The previous prime is 2101221127. The next prime is 2101221169. The reversal of 2101221131 is 1311221012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101221131 - 2² = 2101221127 is a prime.

It is a super-2 number, since 2×2101221131² = 8830260482721838322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101221631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77690 + ... + 101183.

It is an arithmetic number, because the mean of its divisors is an integer number (278506818).

Almost surely, 2^2101221131 is an apocalyptic number.

2101221131 is a deficient number, since it is larger than the sum of its proper divisors (126833413).

2101221131 is a wasteful number, since it uses less digits than its factorization.

2101221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179581.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2101221131 is about 45839.0786447546. The cubic root of 2101221131 is about 1280.8273319575.

Adding to 2101221131 its reverse (1311221012), we get a palindrome (3412442143).

The spelling of 2101221131 in words is "two billion, one hundred one million, two hundred twenty-one thousand, one hundred thirty-one".