101212020121 has 16 divisors (see below), whose sum is σ = 103437725760. Its totient is φ = 98998511040.

The previous prime is 101212020089. The next prime is 101212020127. The reversal of 101212020121 is 121020212101.

It is a cyclic number.

It is not a de Polignac number, because 101212020121 - 2⁵ = 101212020089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101212020127) 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, 34065166 + ... + 34068136.

It is an arithmetic number, because the mean of its divisors is an integer number (6464857860).

Almost surely, 2^101212020121 is an apocalyptic number.

It is an amenable number.

101212020121 is a deficient number, since it is larger than the sum of its proper divisors (2225705639).

101212020121 is a wasteful number, since it uses less digits than its factorization.

101212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101212020121 its reverse (121020212101), we get a palindrome (222232232222).

The spelling of 101212020121 in words is "one hundred one billion, two hundred twelve million, twenty thousand, one hundred twenty-one".