211421021434 has 8 divisors (see below), whose sum is σ = 362436036768. Its totient is φ = 90609009180.

The previous prime is 211421021393. The next prime is 211421021447. The reversal of 211421021434 is 434120124112.

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

It is a junction number, because it is equal to n+sod(n) for n = 211421021399 and 211421021408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7550750752 + ... + 7550750779.

It is an arithmetic number, because the mean of its divisors is an integer number (45304504596).

Almost surely, 2^211421021434 is an apocalyptic number.

211421021434 is a deficient number, since it is larger than the sum of its proper divisors (151015015334).

211421021434 is a wasteful number, since it uses less digits than its factorization.

211421021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101501540.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 211421021434 its reverse (434120124112), we get a palindrome (645541145546).

The spelling of 211421021434 in words is "two hundred eleven billion, four hundred twenty-one million, twenty-one thousand, four hundred thirty-four".