121311222000 has 80 divisors (see below), whose sum is σ = 391107399072. Its totient is φ = 32349657600.

The previous prime is 121311221959. The next prime is 121311222041. The reversal of 121311222000 is 222113121.

It is an interprime number because it is at equal distance from previous prime (121311221959) and next prime (121311222041).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10103269 + ... + 10115268.

Almost surely, 2^121311222000 is an apocalyptic number.

121311222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121311222000 is an abundant number, since it is smaller than the sum of its proper divisors (269796177072).

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

121311222000 is a wasteful number, since it uses less digits than its factorization.

121311222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20218563 (or 20218547 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121311222000 its reverse (222113121), we get a palindrome (121533335121).

The spelling of 121311222000 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred twenty-two thousand".