211421402115 has 48 divisors (see below), whose sum is σ = 424939570944. Its totient is φ = 87863434560.

The previous prime is 211421402111. The next prime is 211421402131. The reversal of 211421402115 is 511204124112.

It is not a de Polignac number, because 211421402115 - 2² = 211421402111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211421402111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8307697 + ... + 8333106.

It is an arithmetic number, because the mean of its divisors is an integer number (8852907728).

Almost surely, 2^211421402115 is an apocalyptic number.

211421402115 is an abundant number, since it is smaller than the sum of its proper divisors (213518168829).

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

211421402115 is a wasteful number, since it uses less digits than its factorization.

211421402115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640840 (or 16640829 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 211421402115 its reverse (511204124112), we get a palindrome (722625526227).

The spelling of 211421402115 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred two thousand, one hundred fifteen".