121222101987 has 32 divisors (see below), whose sum is σ = 207161971200. Its totient is φ = 68622380064.

The previous prime is 121222101971. The next prime is 121222101991. The reversal of 121222101987 is 789101222121.

It is not a de Polignac number, because 121222101987 - 2⁴ = 121222101971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121222103987) 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, 2976912 + ... + 3017357.

It is an arithmetic number, because the mean of its divisors is an integer number (6473811600).

Almost surely, 2^121222101987 is an apocalyptic number.

121222101987 is a deficient number, since it is larger than the sum of its proper divisors (85939869213).

121222101987 is a wasteful number, since it uses less digits than its factorization.

121222101987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994392 (or 5994386 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 121222101987 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, nine hundred eighty-seven".