101221021097 has 16 divisors (see below), whose sum is σ = 121843138560. Its totient is φ = 82144908432.

The previous prime is 101221021091. The next prime is 101221021129. The reversal of 101221021097 is 790120122101.

It is a cyclic number.

It is not a de Polignac number, because 101221021097 - 2²² = 101216826793 is a prime.

It is a super-2 number, since 2×101221021097² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221021091) 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, 7643 + ... + 450000.

It is an arithmetic number, because the mean of its divisors is an integer number (7615196160).

Almost surely, 2^101221021097 is an apocalyptic number.

It is an amenable number.

101221021097 is a deficient number, since it is larger than the sum of its proper divisors (20622117463).

101221021097 is a wasteful number, since it uses less digits than its factorization.

101221021097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459332.

The product of its (nonzero) digits is 504, while the sum is 26.

Adding to 101221021097 its reverse (790120122101), we get a palindrome (891341143198).

The spelling of 101221021097 in words is "one hundred one billion, two hundred twenty-one million, twenty-one thousand, ninety-seven".