201001011111121 has 16 divisors (see below), whose sum is σ = 220547720574720. Its totient is φ = 182037914735040.

The previous prime is 201001011111071. The next prime is 201001011111127. The reversal of 201001011111121 is 121111110100102.

It is a de Polignac number, because none of the positive numbers 2^k-201001011111121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201001011111127) 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, 242085316 + ... + 242914186.

It is an arithmetic number, because the mean of its divisors is an integer number (13784232535920).

Almost surely, 2^{201001011111121} is an apocalyptic number.

It is an amenable number.

201001011111121 is a deficient number, since it is larger than the sum of its proper divisors (19546709463599).

201001011111121 is a wasteful number, since it uses less digits than its factorization.

201001011111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180896.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 201001011111121 its reverse (121111110100102), we get a palindrome (322112121211223).

The spelling of 201001011111121 in words is "two hundred one trillion, one billion, eleven million, one hundred eleven thousand, one hundred twenty-one".