121010201001 has 96 divisors (see below), whose sum is σ = 196276174848. Its totient is φ = 71564549760.

The previous prime is 121010200951. The next prime is 121010201017. The reversal of 121010201001 is 100102010121.

It is a happy number.

It is not a de Polignac number, because 121010201001 - 2¹⁵ = 121010168233 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121010201021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15903940 + ... + 15911546.

It is an arithmetic number, because the mean of its divisors is an integer number (2044543488).

Almost surely, 2^121010201001 is an apocalyptic number.

It is an amenable number.

121010201001 is a deficient number, since it is larger than the sum of its proper divisors (75265973847).

121010201001 is a wasteful number, since it uses less digits than its factorization.

121010201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7771 (or 7768 counting only the distinct ones).

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

Adding to 121010201001 its reverse (100102010121), we get a palindrome (221112211122).

The spelling of 121010201001 in words is "one hundred twenty-one billion, ten million, two hundred one thousand, one".