211212140142 has 8 divisors (see below), whose sum is σ = 422424280296. Its totient is φ = 70404046712.

The previous prime is 211212140099. The next prime is 211212140149. The reversal of 211212140142 is 241041212112.

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

211212140142 is an admirable number.

It is a super-2 number, since 2×211212140142² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212140149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17601011673 + ... + 17601011684.

It is an arithmetic number, because the mean of its divisors is an integer number (52803035037).

Almost surely, 2^211212140142 is an apocalyptic number.

211212140142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

211212140142 is a wasteful number, since it uses less digits than its factorization.

211212140142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35202023362.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211212140142 its reverse (241041212112), we get a palindrome (452253352254).

The spelling of 211212140142 in words is "two hundred eleven billion, two hundred twelve million, one hundred forty thousand, one hundred forty-two".