121301220201999 has 32 divisors (see below), whose sum is σ = 165523136486400. Its totient is φ = 78994416049920.

The previous prime is 121301220201989. The next prime is 121301220202103. The reversal of 121301220201999 is 999102022103121.

It is not a de Polignac number, because 121301220201999 - 2¹⁶ = 121301220136463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121301220201999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121301220201989) 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, 895388742 + ... + 895524204.

It is an arithmetic number, because the mean of its divisors is an integer number (5172598015200).

Almost surely, 2^{121301220201999} is an apocalyptic number.

121301220201999 is a deficient number, since it is larger than the sum of its proper divisors (44221916284401).

121301220201999 is a wasteful number, since it uses less digits than its factorization.

121301220201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174215.

The product of its (nonzero) digits is 34992, while the sum is 42.

The spelling of 121301220201999 in words is "one hundred twenty-one trillion, three hundred one billion, two hundred twenty million, two hundred one thousand, nine hundred ninety-nine".