221031400001 has 4 divisors (see below), whose sum is σ = 232664631600. Its totient is φ = 209398168404.

The previous prime is 221031399983. The next prime is 221031400013. The reversal of 221031400001 is 100004130122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221031400001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221031400061) 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, 5816615771 + ... + 5816615808.

It is an arithmetic number, because the mean of its divisors is an integer number (58166157900).

Almost surely, 2^221031400001 is an apocalyptic number.

It is an amenable number.

221031400001 is a deficient number, since it is larger than the sum of its proper divisors (11633231599).

221031400001 is a wasteful number, since it uses less digits than its factorization.

221031400001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11633231598.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221031400001 its reverse (100004130122), we get a palindrome (321035530123).

The spelling of 221031400001 in words is "two hundred twenty-one billion, thirty-one million, four hundred thousand, one".