121221022101 has 8 divisors (see below), whose sum is σ = 165066923904. Its totient is φ = 79094567520.

The previous prime is 121221022049. The next prime is 121221022127. The reversal of 121221022101 is 101220122121.

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

It is not a de Polignac number, because 121221022101 - 2²⁵ = 121187467669 is a prime.

It is a super-2 number, since 2×121221022101² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221024101) 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, 429861640 + ... + 429861921.

It is an arithmetic number, because the mean of its divisors is an integer number (20633365488).

Almost surely, 2^121221022101 is an apocalyptic number.

It is an amenable number.

121221022101 is a deficient number, since it is larger than the sum of its proper divisors (43845901803).

121221022101 is an equidigital number, since it uses as much as digits as its factorization.

121221022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859723611.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221022101 its reverse (101220122121), we get a palindrome (222441144222).

The spelling of 121221022101 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred one".