201000100021121 has 4 divisors (see below), whose sum is σ = 209739234804672. Its totient is φ = 192260965237572.

The previous prime is 201000100021117. The next prime is 201000100021141. The reversal of 201000100021121 is 121120001000102.

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 201000100021121 - 2² = 201000100021117 is a prime.

It is a super-3 number, since 3×201000100021121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201000100021141) 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, 4369567391741 + ... + 4369567391786.

It is an arithmetic number, because the mean of its divisors is an integer number (52434808701168).

Almost surely, 2^{201000100021121} is an apocalyptic number.

It is an amenable number.

201000100021121 is a deficient number, since it is larger than the sum of its proper divisors (8739134783551).

201000100021121 is an equidigital number, since it uses as much as digits as its factorization.

201000100021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8739134783550.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201000100021121 its reverse (121120001000102), we get a palindrome (322120101021223).

The spelling of 201000100021121 in words is "two hundred one trillion, one hundred million, twenty-one thousand, one hundred twenty-one".