121122120000021 has 128 divisors (see below), whose sum is σ = 196915677364224. Its totient is φ = 64763582400000.

The previous prime is 121122120000019. The next prime is 121122120000041. The reversal of 121122120000021 is 120000021221121.

It is not a de Polignac number, because 121122120000021 - 2¹ = 121122120000019 is a prime.

It is a super-3 number, since 3×121122120000021³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122120000041) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1381509016 + ... + 1381596686.

It is an arithmetic number, because the mean of its divisors is an integer number (1538403729408).

Almost surely, 2^{121122120000021} is an apocalyptic number.

It is an amenable number.

121122120000021 is a deficient number, since it is larger than the sum of its proper divisors (75793557364203).

121122120000021 is a wasteful number, since it uses less digits than its factorization.

121122120000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88215.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121122120000021 its reverse (120000021221121), we get a palindrome (241122141221142).

The spelling of 121122120000021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred twenty million, twenty-one", and thus it is an aban number.