121122022021 has 64 divisors (see below), whose sum is σ = 168415188480. Its totient is φ = 84025589760.

The previous prime is 121122022001. The next prime is 121122022027. The reversal of 121122022021 is 120220221121.

It is a happy number.

It is not a de Polignac number, because 121122022021 - 2⁵ = 121122021989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121122021986 and 121122022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122022027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 37649005 + ... + 37652221.

It is an arithmetic number, because the mean of its divisors is an integer number (2631487320).

Almost surely, 2^121122022021 is an apocalyptic number.

121122022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121122022021 is a deficient number, since it is larger than the sum of its proper divisors (47293166459).

121122022021 is a wasteful number, since it uses less digits than its factorization.

121122022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121122022021 its reverse (120220221121), we get a palindrome (241342243142).

Subtracting from 121122022021 its reverse (120220221121), we obtain a square (901800900 = 30030²).

The spelling of 121122022021 in words is "one hundred twenty-one billion, one hundred twenty-two million, twenty-two thousand, twenty-one".