2111220210121 has 4 divisors (see below), whose sum is σ = 2303149320144. Its totient is φ = 1919291100100.

The previous prime is 2111220210101. The next prime is 2111220210179. The reversal of 2111220210121 is 1210120221112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2111220210121 - 2¹¹ = 2111220208073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111220210095 and 2111220210104.

It is not an unprimeable number, because it can be changed into a prime (2111220210101) 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, 95964554995 + ... + 95964555016.

It is an arithmetic number, because the mean of its divisors is an integer number (575787330036).

Almost surely, 2^{2111220210121} is an apocalyptic number.

It is an amenable number.

2111220210121 is a deficient number, since it is larger than the sum of its proper divisors (191929110023).

2111220210121 is a wasteful number, since it uses less digits than its factorization.

2111220210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191929110022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111220210121 its reverse (1210120221112), we get a palindrome (3321340431233).

The spelling of 2111220210121 in words is "two trillion, one hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-one".