2111202121 has 16 divisors (see below), whose sum is σ = 2462142208. Its totient is φ = 1772928000.

The previous prime is 2111202101. The next prime is 2111202139. The reversal of 2111202121 is 1212021112.

It is a cyclic number.

It is not a de Polignac number, because 2111202121 - 2¹⁷ = 2111071049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111202101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63481 + ... + 90841.

It is an arithmetic number, because the mean of its divisors is an integer number (153883888).

Almost surely, 2^2111202121 is an apocalyptic number.

It is an amenable number.

2111202121 is a deficient number, since it is larger than the sum of its proper divisors (350940087).

2111202121 is a wasteful number, since it uses less digits than its factorization.

2111202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27592.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2111202121 is about 45947.8195456542. The cubic root of 2111202121 is about 1282.8521444586.

Adding to 2111202121 its reverse (1212021112), we get a palindrome (3323223233).

The spelling of 2111202121 in words is "two billion, one hundred eleven million, two hundred two thousand, one hundred twenty-one".