101011201001221 has 32 divisors (see below), whose sum is σ = 122522831608320. Its totient is φ = 81294205188096.

The previous prime is 101011201001209. The next prime is 101011201001237. The reversal of 101011201001221 is 122100102110101.

It is a happy number.

It is not a de Polignac number, because 101011201001221 - 2¹⁵ = 101011200968453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101011201001021) 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, 547236681 + ... + 547421233.

It is an arithmetic number, because the mean of its divisors is an integer number (3828838487760).

Almost surely, 2^{101011201001221} is an apocalyptic number.

It is an amenable number.

101011201001221 is a deficient number, since it is larger than the sum of its proper divisors (21511630607099).

101011201001221 is a wasteful number, since it uses less digits than its factorization.

101011201001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195493.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101011201001221 its reverse (122100102110101), we get a palindrome (223111303111322).

The spelling of 101011201001221 in words is "one hundred one trillion, eleven billion, two hundred one million, one thousand, two hundred twenty-one".