1220101545 has 32 divisors (see below), whose sum is σ = 2104284672. Its totient is φ = 600106752.

The previous prime is 1220101489. The next prime is 1220101591. The reversal of 1220101545 is 5451010221.

It is not a de Polignac number, because 1220101545 - 2¹⁵ = 1220068777 is a prime.

It is a super-2 number, since 2×1220101545² = 2977295560222774050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275287 + ... + 279683.

It is an arithmetic number, because the mean of its divisors is an integer number (65758896).

Almost surely, 2^1220101545 is an apocalyptic number.

1220101545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220101545 is a deficient number, since it is larger than the sum of its proper divisors (884183127).

1220101545 is a wasteful number, since it uses less digits than its factorization.

1220101545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1220101545 is about 34929.9519753463. The cubic root of 1220101545 is about 1068.5593751875.

Adding to 1220101545 its reverse (5451010221), we get a palindrome (6671111766).

The spelling of 1220101545 in words is "one billion, two hundred twenty million, one hundred one thousand, five hundred forty-five".