121222212001 has 32 divisors (see below), whose sum is σ = 140528183040. Its totient is φ = 103344998400.

The previous prime is 121222211989. The next prime is 121222212019. The reversal of 121222212001 is 100212222121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121222212001 - 2¹⁵ = 121222179233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222212301) 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, 94042965 + ... + 94044253.

It is an arithmetic number, because the mean of its divisors is an integer number (4391505720).

Almost surely, 2^121222212001 is an apocalyptic number.

121222212001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121222212001 is a deficient number, since it is larger than the sum of its proper divisors (19305971039).

121222212001 is a wasteful number, since it uses less digits than its factorization.

121222212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745.

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

Adding to 121222212001 its reverse (100212222121), we get a palindrome (221434434122).

The spelling of 121222212001 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, one".