1011211110987 has 64 divisors (see below), whose sum is σ = 1720844697600. Its totient is φ = 512898439680.

The previous prime is 1011211110911. The next prime is 1011211110997. The reversal of 1011211110987 is 7890111121101.

It is not a de Polignac number, because 1011211110987 - 2⁸ = 1011211110731 is a prime.

It is a super-2 number, since 2×1011211110987² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1011211110907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4437939 + ... + 4660227.

It is an arithmetic number, because the mean of its divisors is an integer number (26888198400).

Almost surely, 2^{1011211110987} is an apocalyptic number.

1011211110987 is a deficient number, since it is larger than the sum of its proper divisors (709633586613).

1011211110987 is a wasteful number, since it uses less digits than its factorization.

1011211110987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222776.

The product of its (nonzero) digits is 1008, while the sum is 33.

The spelling of 1011211110987 in words is "one trillion, eleven billion, two hundred eleven million, one hundred ten thousand, nine hundred eighty-seven".