400221202101 has 32 divisors (see below), whose sum is σ = 646282499328. Its totient is φ = 215062533120.

The previous prime is 400221202097. The next prime is 400221202109. The reversal of 400221202101 is 101202122004.

It is not a de Polignac number, because 400221202101 - 2² = 400221202097 is a prime.

It is a super-2 number, since 2×400221202101² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400221202109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53010 + ... + 896243.

It is an arithmetic number, because the mean of its divisors is an integer number (20196328104).

Almost surely, 2^400221202101 is an apocalyptic number.

It is an amenable number.

400221202101 is a deficient number, since it is larger than the sum of its proper divisors (246061297227).

400221202101 is a wasteful number, since it uses less digits than its factorization.

400221202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950461.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 400221202101 its reverse (101202122004), we get a palindrome (501423324105).

The spelling of 400221202101 in words is "four hundred billion, two hundred twenty-one million, two hundred two thousand, one hundred one".