401221601022 has 32 divisors (see below), whose sum is σ = 875585170944. Its totient is φ = 121555555200.

The previous prime is 401221600937. The next prime is 401221601029. The reversal of 401221601022 is 220106122104.

It is a self number, because there is not a number n which added to its sum of digits gives 401221601022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401221601029) 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, 365398 + ... + 967449.

It is an arithmetic number, because the mean of its divisors is an integer number (27362036592).

Almost surely, 2^401221601022 is an apocalyptic number.

401221601022 is an abundant number, since it is smaller than the sum of its proper divisors (474363569922).

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

401221601022 is a wasteful number, since it uses less digits than its factorization.

401221601022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337424.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 401221601022 its reverse (220106122104), we get a palindrome (621327723126).

The spelling of 401221601022 in words is "four hundred one billion, two hundred twenty-one million, six hundred one thousand, twenty-two".