121220222002021 has 16 divisors (see below), whose sum is σ = 124485689548800. Its totient is φ = 117998087079600.

The previous prime is 121220222001973. The next prime is 121220222002049. The reversal of 121220222002021 is 120200222022121.

It is a cyclic number.

It is not a de Polignac number, because 121220222002021 - 2²¹ = 121220219904869 is a prime.

It is a super-2 number, since 2×121220222002021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121220222002021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220222002921) 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, 419246020 + ... + 419535058.

It is an arithmetic number, because the mean of its divisors is an integer number (7780355596800).

Almost surely, 2^{121220222002021} is an apocalyptic number.

It is an amenable number.

121220222002021 is a deficient number, since it is larger than the sum of its proper divisors (3265467546779).

121220222002021 is an equidigital number, since it uses as much as digits as its factorization.

121220222002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363960.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121220222002021 its reverse (120200222022121), we get a palindrome (241420444024142).

The spelling of 121220222002021 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two thousand, twenty-one".