121222121211000 has 128 divisors (see below), whose sum is σ = 420236686958400. Its totient is φ = 32325898982400.

The previous prime is 121222121210963. The next prime is 121222121211083. The reversal of 121222121211000 is 112121222121.

121222121211000 is a `hidden beast` number, since 1 + 212 + 221 + 21 + 211 + 0 + 0 + 0 = 666.

It is a super-2 number, since 2×121222121211000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2244827097 + ... + 2244881096.

Almost surely, 2^{121222121211000} is an apocalyptic number.

121222121211000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222121211000 is an abundant number, since it is smaller than the sum of its proper divisors (299014565747400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121222121211000 is a wasteful number, since it uses less digits than its factorization.

121222121211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489708223 (or 4489708203 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121222121211000 its reverse (112121222121), we get a palindrome (121334242433121).

The spelling of 121222121211000 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand".