211142023420 has 48 divisors (see below), whose sum is σ = 446524420608. Its totient is φ = 83862947840.

The previous prime is 211142023399. The next prime is 211142023423. The reversal of 211142023420 is 24320241112.

It is a junction number, because it is equal to n+sod(n) for n = 211142023391 and 211142023400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211142023423) 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, 2078124 + ... + 2177356.

It is an arithmetic number, because the mean of its divisors is an integer number (9302592096).

Almost surely, 2^211142023420 is an apocalyptic number.

211142023420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211142023420 is an abundant number, since it is smaller than the sum of its proper divisors (235382397188).

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

211142023420 is a wasteful number, since it uses less digits than its factorization.

211142023420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99990 (or 99988 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 211142023420 its reverse (24320241112), we get a palindrome (235462264532).

The spelling of 211142023420 in words is "two hundred eleven billion, one hundred forty-two million, twenty-three thousand, four hundred twenty".