121142021 has 16 divisors (see below), whose sum is σ = 162653568. Its totient is φ = 87134400.

The previous prime is 121142011. The next prime is 121142057. The reversal of 121142021 is 120241121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121142021 - 2⁶ = 121141957 is a prime.

It is a super-3 number, since 3×121142021³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121141987 and 121142005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121142011) 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, 59510 + ... + 61511.

It is an arithmetic number, because the mean of its divisors is an integer number (10165848).

Almost surely, 2^121142021 is an apocalyptic number.

121142021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121142021 is a deficient number, since it is larger than the sum of its proper divisors (41511547).

121142021 is a wasteful number, since it uses less digits than its factorization.

121142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121052.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 121142021 is about 11006.4536068617. The cubic root of 121142021 is about 494.8021805883.

Adding to 121142021 its reverse (120241121), we get a palindrome (241383142).

The spelling of 121142021 in words is "one hundred twenty-one million, one hundred forty-two thousand, twenty-one".