101211210121 has 8 divisors (see below), whose sum is σ = 115685377920. Its totient is φ = 86740898208.

The previous prime is 101211210119. The next prime is 101211210137. The reversal of 101211210121 is 121012112101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101211210121 - 2¹ = 101211210119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101211210521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907501 + ... + 1012906.

It is an arithmetic number, because the mean of its divisors is an integer number (14460672240).

Almost surely, 2^101211210121 is an apocalyptic number.

It is an amenable number.

101211210121 is a deficient number, since it is larger than the sum of its proper divisors (14474167799).

101211210121 is an equidigital number, since it uses as much as digits as its factorization.

101211210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927943.

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

Adding to 101211210121 its reverse (121012112101), we get a palindrome (222223322222).

The spelling of 101211210121 in words is "one hundred one billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".