121102020091 has 8 divisors (see below), whose sum is σ = 130509229760. Its totient is φ = 111707906112.

The previous prime is 121102020073. The next prime is 121102020103. The reversal of 121102020091 is 190020201121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121102020091 - 2¹⁵ = 121101987323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121102020041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3254706 + ... + 3291703.

It is an arithmetic number, because the mean of its divisors is an integer number (16313653720).

Almost surely, 2^121102020091 is an apocalyptic number.

121102020091 is a deficient number, since it is larger than the sum of its proper divisors (9407209669).

121102020091 is a wasteful number, since it uses less digits than its factorization.

121102020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547845.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 121102020091 in words is "one hundred twenty-one billion, one hundred two million, twenty thousand, ninety-one".