201012111121 has 4 divisors (see below), whose sum is σ = 204012291952. Its totient is φ = 198011930292.

The previous prime is 201012111101. The next prime is 201012111133. The reversal of 201012111121 is 121111210102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 201012111121 - 2⁷ = 201012110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201012111101) 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, 1500090315 + ... + 1500090448.

It is an arithmetic number, because the mean of its divisors is an integer number (51003072988).

Almost surely, 2^201012111121 is an apocalyptic number.

It is an amenable number.

201012111121 is a deficient number, since it is larger than the sum of its proper divisors (3000180831).

201012111121 is an equidigital number, since it uses as much as digits as its factorization.

201012111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000180830.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201012111121 its reverse (121111210102), we get a palindrome (322123321223).

The spelling of 201012111121 in words is "two hundred one billion, twelve million, one hundred eleven thousand, one hundred twenty-one".