121023021 has 32 divisors (see below), whose sum is σ = 189923328. Its totient is φ = 67109760.

The previous prime is 121023013. The next prime is 121023031. The reversal of 121023021 is 120320121.

It is not a de Polignac number, because 121023021 - 2³ = 121023013 is a prime.

It is a super-2 number, since 2×121023021² = 29293143223932882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121022988 and 121023006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121023031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315796 + ... + 316178.

It is an arithmetic number, because the mean of its divisors is an integer number (5935104).

Almost surely, 2^121023021 is an apocalyptic number.

It is an amenable number.

121023021 is a deficient number, since it is larger than the sum of its proper divisors (68900307).

121023021 is a wasteful number, since it uses less digits than its factorization.

121023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121023021 is about 11001.0463593242. The cubic root of 121023021 is about 494.6401097956.

Adding to 121023021 its reverse (120320121), we get a palindrome (241343142).

The spelling of 121023021 in words is "one hundred twenty-one million, twenty-three thousand, twenty-one".