121143021 has 8 divisors (see below), whose sum is σ = 162013344. Its totient is φ = 80517360.

The previous prime is 121143007. The next prime is 121143049. The reversal of 121143021 is 120341121.

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

It is not a de Polignac number, because 121143021 - 2¹¹ = 121140973 is a prime.

It is a super-3 number, since 3×121143021³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143091) 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, 60006 + ... + 61991.

It is an arithmetic number, because the mean of its divisors is an integer number (20251668).

Almost surely, 2^121143021 is an apocalyptic number.

It is an amenable number.

121143021 is a deficient number, since it is larger than the sum of its proper divisors (40870323).

121143021 is a wasteful number, since it uses less digits than its factorization.

121143021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122331.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121143021 is about 11006.4990346613. The cubic root of 121143021 is about 494.8035420779.

Adding to 121143021 its reverse (120341121), we get a palindrome (241484142).

The spelling of 121143021 in words is "one hundred twenty-one million, one hundred forty-three thousand, twenty-one".