101211220987 has 16 divisors (see below), whose sum is σ = 111314917440. Its totient is φ = 91708769152.

The previous prime is 101211220967. The next prime is 101211220991. The reversal of 101211220987 is 789022112101.

It is a cyclic number.

It is not a de Polignac number, because 101211220987 - 2³⁵ = 66851482619 is a prime.

It is a super-2 number, since 2×101211220987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101211220967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1396168 + ... + 1466869.

It is an arithmetic number, because the mean of its divisors is an integer number (6957182340).

Almost surely, 2^101211220987 is an apocalyptic number.

101211220987 is a deficient number, since it is larger than the sum of its proper divisors (10103696453).

101211220987 is a wasteful number, since it uses less digits than its factorization.

101211220987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863142.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 101211220987 in words is "one hundred one billion, two hundred eleven million, two hundred twenty thousand, nine hundred eighty-seven".