211421030442 has 16 divisors (see below), whose sum is σ = 423045277632. Its totient is φ = 70439807360.

The previous prime is 211421030441. The next prime is 211421030449. The reversal of 211421030442 is 244030124112.

It is a super-3 number, since 3×211421030442³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (211421030441) 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, 8453838 + ... + 8478809.

It is an arithmetic number, because the mean of its divisors is an integer number (26440329852).

Almost surely, 2^211421030442 is an apocalyptic number.

211421030442 is an abundant number, since it is smaller than the sum of its proper divisors (211624247190).

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

211421030442 is a wasteful number, since it uses less digits than its factorization.

211421030442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16934733.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 211421030442 its reverse (244030124112), we get a palindrome (455451154554).

The spelling of 211421030442 in words is "two hundred eleven billion, four hundred twenty-one million, thirty thousand, four hundred forty-two".