121201011983 has 4 divisors (see below), whose sum is σ = 121614667608. Its totient is φ = 120787356360.

The previous prime is 121201011949. The next prime is 121201012003. The reversal of 121201011983 is 389110102121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121201011983 - 2¹² = 121201007887 is a prime.

It is a super-3 number, since 3×121201011983³ (a number of 34 digits) contains 333 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 (121201011923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206827373 + ... + 206827958.

It is an arithmetic number, because the mean of its divisors is an integer number (30403666902).

Almost surely, 2^121201011983 is an apocalyptic number.

121201011983 is a deficient number, since it is larger than the sum of its proper divisors (413655625).

121201011983 is an equidigital number, since it uses as much as digits as its factorization.

121201011983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413655624.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 121201011983 in words is "one hundred twenty-one billion, two hundred one million, eleven thousand, nine hundred eighty-three".