201001022121111 has 32 divisors (see below), whose sum is σ = 285296484096000. Its totient is φ = 125512810587648.

The previous prime is 201001022121037. The next prime is 201001022121131. The reversal of 201001022121111 is 111121220100102.

It is a happy number.

It is not a de Polignac number, because 201001022121111 - 2³⁹ = 200451266307223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001022121131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71174035 + ... + 73944203.

It is an arithmetic number, because the mean of its divisors is an integer number (8915515128000).

Almost surely, 2^{201001022121111} is an apocalyptic number.

201001022121111 is a deficient number, since it is larger than the sum of its proper divisors (84295461974889).

201001022121111 is a wasteful number, since it uses less digits than its factorization.

201001022121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784583.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201001022121111 its reverse (111121220100102), we get a palindrome (312122242221213).

The spelling of 201001022121111 in words is "two hundred one trillion, one billion, twenty-two million, one hundred twenty-one thousand, one hundred eleven".