121420212099 has 16 divisors (see below), whose sum is σ = 162511142400. Its totient is φ = 80638509056.

The previous prime is 121420212037. The next prime is 121420212113. The reversal of 121420212099 is 990212024121.

It is a cyclic number.

It is not a de Polignac number, because 121420212099 - 2¹⁶ = 121420146563 is a prime.

It is a super-2 number, since 2×121420212099² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121420212499) 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, 1001347 + ... + 1116035.

It is an arithmetic number, because the mean of its divisors is an integer number (10156946400).

Almost surely, 2^121420212099 is an apocalyptic number.

121420212099 is a deficient number, since it is larger than the sum of its proper divisors (41090930301).

121420212099 is a wasteful number, since it uses less digits than its factorization.

121420212099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116034.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 121420212099 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred twelve thousand, ninety-nine".