1211200020987 has 8 divisors (see below), whose sum is σ = 1761745485120. Its totient is φ = 734060618760.

The previous prime is 1211200020977. The next prime is 1211200021019. The reversal of 1211200020987 is 7890200021121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211200020987 - 2⁶ = 1211200020923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 36703030939 = 1211200020987 / (1 + 2 + 1 + 1 + 2 + 0 + 0 + 0 + 2 + 0 + 9 + 8 + 7).

It is not an unprimeable number, because it can be changed into a prime (1211200020977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18351515437 + ... + 18351515502.

It is an arithmetic number, because the mean of its divisors is an integer number (220218185640).

Almost surely, 2^{1211200020987} is an apocalyptic number.

1211200020987 is a deficient number, since it is larger than the sum of its proper divisors (550545464133).

1211200020987 is a wasteful number, since it uses less digits than its factorization.

1211200020987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36703030953.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 1211200020987 in words is "one trillion, two hundred eleven billion, two hundred million, twenty thousand, nine hundred eighty-seven".