121001020101 has 32 divisors (see below), whose sum is σ = 199706976000. Its totient is φ = 71894499264.

The previous prime is 121001020099. The next prime is 121001020111. The reversal of 121001020101 is 101020100121.

It is a happy number.

It is not a de Polignac number, because 121001020101 - 2¹ = 121001020099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001020111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5933481 + ... + 5953838.

It is an arithmetic number, because the mean of its divisors is an integer number (6240843000).

Almost surely, 2^121001020101 is an apocalyptic number.

It is an amenable number.

121001020101 is a deficient number, since it is larger than the sum of its proper divisors (78705955899).

121001020101 is a wasteful number, since it uses less digits than its factorization.

121001020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11887370 (or 11887364 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121001020101 its reverse (101020100121), we get a palindrome (222021120222).

The spelling of 121001020101 in words is "one hundred twenty-one billion, one million, twenty thousand, one hundred one".