2211021023545 has 16 divisors (see below), whose sum is σ = 2792981880000. Its totient is φ = 1675653265728.

The previous prime is 2211021023537. The next prime is 2211021023609. The reversal of 2211021023545 is 5453201201122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2211021023545 - 2³ = 2211021023537 is a prime.

It is a super-2 number, since 2×2211021023545² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949086 + ... + 2867224.

It is an arithmetic number, because the mean of its divisors is an integer number (174561367500).

Almost surely, 2^{2211021023545} is an apocalyptic number.

It is an amenable number.

2211021023545 is a deficient number, since it is larger than the sum of its proper divisors (581960856455).

2211021023545 is a wasteful number, since it uses less digits than its factorization.

2211021023545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943512.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 2211021023545 its reverse (5453201201122), we get a palindrome (7664222224667).

The spelling of 2211021023545 in words is "two trillion, two hundred eleven billion, twenty-one million, twenty-three thousand, five hundred forty-five".