121021211101 has 16 divisors (see below), whose sum is σ = 144347904000. Its totient is φ = 99205535088.

The previous prime is 121021211093. The next prime is 121021211161. The reversal of 121021211101 is 101112120121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121021211101 - 2³ = 121021211093 is a prime.

It is a super-2 number, since 2×121021211101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021211161) 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, 937410 + ... + 1058668.

It is an arithmetic number, because the mean of its divisors is an integer number (9021744000).

Almost surely, 2^121021211101 is an apocalyptic number.

It is an amenable number.

121021211101 is a deficient number, since it is larger than the sum of its proper divisors (23326692899).

121021211101 is a wasteful number, since it uses less digits than its factorization.

121021211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127488.

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

Adding to 121021211101 its reverse (101112120121), we get a palindrome (222133331222).

The spelling of 121021211101 in words is "one hundred twenty-one billion, twenty-one million, two hundred eleven thousand, one hundred one".