211561451142 has 16 divisors (see below), whose sum is σ = 445392528960. Its totient is φ = 66808879272.

The previous prime is 211561451141. The next prime is 211561451147. The reversal of 211561451142 is 241154165112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211561451141) 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, 927900988 + ... + 927901215.

It is an arithmetic number, because the mean of its divisors is an integer number (27837033060).

Almost surely, 2^211561451142 is an apocalyptic number.

211561451142 is an abundant number, since it is smaller than the sum of its proper divisors (233831077818).

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

211561451142 is a wasteful number, since it uses less digits than its factorization.

211561451142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855802227.

The product of its digits is 9600, while the sum is 33.

The spelling of 211561451142 in words is "two hundred eleven billion, five hundred sixty-one million, four hundred fifty-one thousand, one hundred forty-two".